JP2816846B2 - Interlaced multifilament multifilament composite yarn and method for producing bulky fabric using the yarn - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a bulky yarn using splittable conjugate fibers and a bulky woven fabric using the bulky yarn.

2. Description of the Related Art It is known that a multifilament yarn is guided to a fluid turbulent flow region while traveling, and a protruding bulky yarn is formed on a surface of the yarn by a mixture of an open loop and a closed loop. The bulky yarn obtained by this means has a feeling and bulkiness similar to a spun yarn, and has a uniform thickness not found in a spun yarn.

Conventionally, high-density cotton high-density fabrics have been used in the field of winter clothing such as ski wear and mountain climbing wear.

However, high-quality cotton yarn is used for warp and weft yarns, and weaving is performed at high density. There was a drawback that dissemination was hindered.

Therefore, using a synthetic fiber multifilament yarn that has a thickness comparable to that of high-grade cotton and can be arbitrarily changed, and has a high strength, a high-density woven fabric with the feeling of spun yarn and bulkiness is used. It was developed, but initially it was not satisfactory.

Synthetic fiber multifilament yarns are yarns having an extremely uniform thickness as compared with spun yarns, but have the disadvantage of lacking bulkiness. Therefore, various techniques for increasing the bulk without impairing the uniform thickness of the synthetic fiber multifilament yarn have been proposed. False twist crimping as these means,
Examples include forming crimping, rubbing crimping, and fluid bulking. Above all, since the bulky yarn obtained by the fluid bulking process has the characteristic of being non-stretchable and non-swirl unlike the yarn obtained by the other means described above, this yarn is used for fabric. If it is, it has excellent morphological stability compared to other crimped yarns.

Therefore, a woven fabric woven using this yarn has a uniform appearance without yarn unevenness such as a spun yarn, and can be obtained with excellent bulkiness. However, since the yarn obtained by fluid bulking has a form in which fine open loops and closed loops are mixed and protruding on its surface, it is excellent in bulkiness, but the high processing passability is very good. Absent. Especially when used as a woven fabric, when used for warp yarns, as described above, fine protrusions on the surface of the yarn cause poor passage of healds and reeds, causing not only yarn breakage, but also adjacent warp yarns having a zipper effect. As a result, the weaving efficiency is remarkably reduced by causing entanglement due to entanglement, and as a result, it has a fatal defect that it cannot be used for the warp of high-density woven fabric.

Further, in some fields, there has been a demand for a high-grade product having a soft and supple bulkiness, which is a feature of the original high-density bulky fabric using fine cotton count, or a natural surface gloss and appearance. . When producing a bulky yarn obtained by a fluid turbulent flow treatment as an attempt to satisfy such demands, using a split-split composite fiber composed of a polyamide fiber component and a polyester fiber component in the yarn constituting the bulky yarn. Japanese Patent Application Laid-Open No. 61-6348 attempts to impart soft and supple bulkiness to a woven fabric by weaving it into fine fibers after weaving. But JP
The technology disclosed in No. 61-6348 is a method of knitting and weaving a bulky yarn obtained by subjecting a split / split composite fiber multifilament yarn obtained by compounding a polyamide fiber component and a polyester fiber component to a fluid turbulent flow treatment. With the fabric, the fabric is divided and separated by a chemical agent to form a ring or tarmi consisting of a polyester component of 0.4 denier or less,
No technique is disclosed for increasing the density.

SUMMARY OF THE INVENTION An object of the present invention is to remedy the above-mentioned deficiencies of the prior art and to provide a soft, supple bulkiness, a unique surface gloss and a high density of a high-density fabric obtained using a high-grade cotton count. It is an object of the present invention to provide a novel entangled mixed-filament multifilament composite yarn for obtaining a woven fabric having a superior appearance, and a novel bulky woven fabric using the composite yarn.

[Means for Solving the Problems] The present invention has the following configuration to achieve the above object.

First, the entangled multifilament multifilament composite yarn according to the present invention is composed of at least two types of multifilament yarns having different hot water shrinkage rates, and the entangled multifilament multifilament having a mixture of open loops and closed loops protruding on the surface of the yarn. A filament composite yarn, wherein a multifilament yarn composed of a high shrinkage fiber is located relatively on the core side, and a dividable composite fiber multifilament yarn having a low shrinkage ratio is located relatively on the sheath side. The individual single fibers constituting the splittable composite fiber multifilament yarn are entangled and mixed with other individual single fibers constituting the splittable composite fiber multifilament yarn while forming a loop, and are relatively cored. The individual filaments constituting the multifilament yarn located on the side are also entangled and mixed, and a mixture of open loops and closed loops projecting from the surface of the yarn is present. Loop is the loop A is 300 / m or more as defined below, the loop B is 50 / m or more, loop C
Is 10 pieces / m or less.

(Here, the loop A, the loop B, and the loop C are a photoelectric type fluff measuring machine (TORAY FRAY which measures the number of loops of a running yarn.)
COUNTER), measuring at a yarn speed of 50 m / min and a running tension of 0.1 g / d, loop A is the number of loops protruding 0.15 mm or more from the yarn surface, and loop A is the number of loops protruding 0.35 mm or more. B, and the number of loops / m protruding 0.6 mm or more are loops C. Further, the method for producing a bulky woven fabric according to the present invention is characterized in that a synthetic fiber multifilament yarn composed of a high shrinkage fiber and a dividable composite fiber multifilament yarn having a low shrinkage ratio are different in an overfeed rate and a fluid turbulent flow region. And then tensioned at a constant underfeed rate to 0.6 m from the yarn surface
By performing the bulky latent treatment so that the number of loops protruding more than m is 10 / m or less, the former multifilament yarn is relatively positioned on the core side, and the latter filament yarn is relatively positioned on the sheath side. Open loops and closed loops are mixedly projected on the yarn surface, and the individual fibers constituting the splittable composite fiber multifilament yarn form a loop while forming the splittable composite fiber multifilament. An entangled mixed multifilament that is entangled and mixed with other individual single fibers constituting the filament yarn and is also entangled and mixed with individual single fibers constituting the multifilament yarn relatively located on the core side The entangled blended multifilament multifilament is woven using the entangled blended multifilament composite yarn as a warp and / or a weft, and then the woven fabric is obtained. After deflated in the longitudinal direction of the composite yarn, it is characterized in that the allowed to split the splittable conjugate fiber to fine fibers.

Further, the bulky woven fabric according to the present invention has an open loop and a closed loop mixedly projecting on the surface of all or some of the yarns constituting the woven fabric, and the open loop and the closed loop have a single fiber fineness of 0.4 d. It consists of the following fine fibers, and is based on the fact that a plurality of these fine fibers form the loop while maintaining an aggregated state.

 Further, the present invention will be described in detail.

The entangled mixed-filament multifilament composite yarn according to the present invention is a core-sheath type composite yarn, and a high shrinkage multifilament yarn is used for the core yarn, and a splittable type multifilament yarn having a relatively low shrinkage rate is used for the sheath yarn. A filament yarn is used, and the two multifilament yarns are obtained by being passed through a fluid turbulent flow region with different overfeed rates.

The feature of the entangled mixed fiber multifilament composite yarn according to the present invention is that the functions of the core yarn and the sheath yarn are separated. That is, the core yarn is made of a fiber exhibiting a high shrinkage rate, and after forming the composite yarn into a woven fabric, the core yarn is shrunk by heat treatment, thereby increasing the density of the woven fabric and increasing the bulkiness of the composite yarn. Therefore, it shows an excellent function of increasing the bulk height of the woven fabric. On the other hand, since the sheath yarn has a low shrinkage and is made of splittable conjugate fiber, the heat shrinkage of the sheath yarn is lower than that of the core yarn by heat treatment after forming the conjugate yarn into a woven fabric. The difference in shrinkage from the core yarn protrudes to the surface, further increasing the bulkiness. Further, since the sheath yarn is a dividable conjugate fiber, the shrinkage-treated woven fabric is subjected to a splitting process of subsequently dividing the sheath yarn into fine fibers, so that an open loop existing on the surface and inside of the woven fabric, As a result of the single fibers forming the closed loop being separated into fine fibers, the fabric has a feature that the feel of the fabric can be made extremely soft. Usually, a bulky yarn obtained by passing through a fluid turbulent region under overfeed shows a function in which an open loop and a closed loop are mixedly protruding on the surface of the yarn, and these open loops and closed loops are entangled by single fibers. Almost fixed. Therefore, the yarn itself is bulky and, when this yarn is pulled closely parallel, exhibits a zipper effect due to the loops projecting to each other's surface,
Since they stick to each other and become difficult to separate from each other, and in severe cases, exhibit the same phenomenon as entangled yarns, they have little special properties of being non-stretchable and bulky, but have hardly been used for warp or tricot of woven fabrics. However, the entangled multifilament multifilament composite yarn according to the present invention has the above-described defect by performing the following bulky latent processing,
The coarse loops among the open loops and closed loops generated by passing through the fluid turbulence region can be eliminated, and the trouble between adjacent yarns due to the above-described fastener effect, entanglement, and entanglement can be eliminated.

The bulky latent processing refers to the following processing. As described above, the coarse one forms an open loop, and a part of the single fiber constituting the composite yarn appears to be slack. Therefore, if the yarn is pulled by the amount corresponding to the slack, the coarse loop is absorbed by the yarn and disappears. This is achieved by subjecting the thus obtained composite yarn to tension treatment under continuous underfeed on a manufacturing apparatus. In the present invention, this tensioning treatment is referred to as a bulky latent treatment. In this way, even when subjected to the bulky latent processing, the inter-entanglement between the single fibers constituting the entangled mixed multifilament conjugate fiber is maintained as it is, and the convergence of the conjugate yarn is maintained, so that it passes through high-order processing. It does not decrease the sex.

FIG. 1 is a schematic view showing one example of a production process of an interlaced mixed multifilament composite yarn according to the present invention. As shown in FIG. 1, a core yarn 2 composed of a high-shrink fiber multifilament yarn unwound from a package 1 is processed through a first supply roller 3 to form a fluid turbulent flow area (actually, compressed air). It is supplied to the device 4 at a low overfeed rate. On the other hand, the sheath yarn 6 made of the low-shrinkable splittable composite fiber multifilament yarn unwound from the package 5 is supplied to the processing device 4 via the second supply roller 7 at an overfeed rate larger than that of the core yarn. You. These core yarn 2 and sheath yarn 6
Are simultaneously supplied to the processing device 4 via appropriate guides 8,9. The sheath yarn 6 can also be supplied directly from the guide 8 to the processing device 4 without passing through the guide 9.

The core yarn 2 and the sheath yarn 6 that have passed through the fluid turbulent flow region of the processing device 4 are formed into a composite yarn 10 that is entangled and integrated on the surface of the core yarn 2 and the sheath yarn 6 in a state where an open loop and a closed loop are mixed and protruded.
After passing through the tension roller 12, the composite yarn 10 is stretched between the take-up roller 11 and the tension roller 12 at an appropriate tension rate (alder feed) by a tension roller 12 provided, subjected to a bulky latent treatment, and then wound. The composite yarn 10 is packaged by the take-off device 13.
Winded up to 14. Composite yarn wound in package 14
On the surface of No. 10, large loops disappear from the surface of the yarn, and the surface is a composite yarn having a smooth surface which cannot be considered as a bulky yarn.

FIG. 2 is a schematic view showing the appearance of the entangled mixed-filament multifilament composite yarn according to the present invention, in which (A) is before a bulky latent treatment and (B) is after a bulky latent treatment. .

As shown in FIG. 2 (A), the high-shrink multifilament yarn forming the core yarn 2 of the entangled mixed multifilament composite yarn 10 is relatively located mainly on the core side of the composite yarn 10. On the target sheath side, a sheath yarn 6 composed of a multi-filament yarn having a low shrinkage and which can be split is located. The individual single fibers 15 constituting the sheath yarn 6 are entangled with other individual single fibers constituting the sheath yarn and form the core yarn 2 while forming loops of various sizes. The individual single fibers 16 are also entangled with each other, and the individual single fibers form the composite yarn 10 bundled by entanglement.

The loop formed on the surface of the composite yarn has an Ω-shaped or l-shaped closed loop, and an open loop (also called sagging) having a bow-like shape having a long opening portion for its height. Mixed, these loops protrude randomly on the surface of the composite yarn. Although these loops have various sizes, small ones form a Ω-shaped or l-shaped closed loop, and large ones form a large arc-shaped open loop. The number and size of these loops are determined by the material composition of the core yarn and the sheath yarn and the processing conditions. Of these loops, the smaller one is relatively stable and forms a closed loop. However, a large loop has many open loops, and a phenomenon in which the loop is squeezed and moves or becomes entangled even when it is entangled with a loop of an adjacent thread appears, which causes a decrease in high-order processing permeability. Therefore, in order to eliminate this phenomenon, the above-described bulky latent processing is performed.

As can be seen from FIG. 2 (B), it can be seen that the composite yarn 10 subjected to the bulky latent treatment has a mode like a normal yarn having a smooth surface as a whole although small loops remain.

When the composite yarn having the properties shown in FIG. 2 (B) is used, the high-order passage property is very good, and the diameter can be easily passed through the diameter adjusting process. .

As the high shrinkage multifilament yarn of the core yarn used in the present invention, those having the following properties are preferably used.

First, it is desirable that the yarn has a shrinkage of at least 10% by shrinkage treatment such as heat shrinkage or swelling by liquid treatment. If the content is less than 10%, satisfactory bulkiness and high density cannot be imparted to the woven fabric. This shrinking treatment is preferably performed by heat treatment, and more preferably, by using boiling water. In addition, since the core yarn must be made into a woven fabric and the yarn must be sufficiently shrunk, the ratio of the fineness to the entire composite yarn must be at least 30%. If this ratio is less than 30%, a satisfactory shrinkage cannot be obtained. When the single fibers constituting the core yarn are too thin, the contraction force is reduced. When the fibers are thick, the contraction force is increased, but the flexibility of the woven fabric is impaired. Of course, depending on the configuration of the sheath yarn, a range of 1 to 15d is appropriate.

The material used for the core yarn is not particularly limited. However, if the shrinkage is to be performed by heat, it is preferable to use a thermoplastic synthetic fiber multifilament. Further, although related to the material of the sheath yarn, it is desirable to use a synthetic fiber containing a copolymer rather than the whole single component.

The sheath yarn of the low-shrinkable splittable composite multifilament yarn used in the present invention has the following properties.

First, it is a dividable composite fiber multifilament yarn, and after weaving, the single fiber of this composite fiber is divided into fine fibers, and the division is performed by mechanical peeling type, non-uniform shrinkage or chemical solution. It is necessary that the single fiber be a composite fiber that can be divided into a plurality of fine fibers through an appropriate means such as a peeling type for an expanding agent and a sea-island type dissolving and removing type. This yarn has at least 30
It must have a fineness of at least%. If the content is 30% or less, the amount as the sheath fiber is insufficient, and satisfactory bulkiness cannot be obtained. Further, the thickness of each single fiber constituting the yarn is 0.5 to 2.5 d. If the denier is less than 0.5 denier, single fiber breakage occurs frequently in each processing step, which lowers the product quality and lowers the operation rate. On the other hand, if it exceeds 2.5d, it is difficult to form a fine closed loop, and it is difficult to obtain a bulky and uniform composite yarn.
The thickness of the fine fiber contained in the single fiber is 0.4d or less. If it is thicker than this, an extremely soft touch cannot be obtained.

Furthermore, the shrinkage of the sheath yarn is smaller than that of the core yarn, and the difference in shrinkage from the core yarn is at least 5%.
The larger the difference between the contraction rates of the core yarn and the sheath yarn, the greater the bulkiness. That is, the length of the sheath yarn corresponding to the difference in the shrinkage ratio between the core yarn and the sheath yarn protrudes outward from the core yarn. If the difference in the shrinkage ratio is less than 5%, the bulk-latent-treated one will considerably increase the density of the fabric even if the fabric is shrunk by heat treatment, but will not increase the bulkiness at all.

A warp and a weft, obtained as described above, and entangled mixed-filament multifilament composite yarn having the above properties
Alternatively, weaving is performed by using a warp or a weft by an ordinary means. At the time of weaving, the design is performed in consideration of the amount of shrinkage of the woven fabric and the degree of increase in bulkiness, and woven based on the design. Weaving is performed by a usual means without using any special means.

The obtained woven fabric is subjected to refining, dyeing, and processing by ordinary means. In these processes, at least shrinkage treatment is performed in the longitudinal direction of the interwoven mixed multifilament multifilament yarn to increase the density of the woven fabric. And bulk. In these shrinking treatments, it is preferable to use a shrinking means by heat treatment since the process can be simplified.

When the shrinkage by the heat treatment is completed, subsequently, the splittable composite fiber multifilament yarn is subjected to a fine fiber treatment. Although a known means is applied to this treatment, it is preferable to use this means because a liquid treatment for dissolving and removing the sea component or the adhesive component can be easily and reliably performed.

The method for producing the latent loop yarn is preferably performed under the following conditions.

The core yarn and the sheath yarn are supplied from the individual supply rollers to the processing device (pressurized air supply amount 80 to 120 Nl / min) forming a compressed air turbulent flow area with different overfeed rates, discharged from the processing device, entangled and mixed The treated latent loop yarn is taken off by the same take-off roller.

The term Obafuido rate and is the surface speed of the feed roller and V _1, when the surface roughness of the take-off roller was V _2,
Assuming that the feed rate is F (%), F (%) = ｛(V1−V
2) When the value of / V2｝ × 100 becomes (+), it is called the overfeed rate.

The conditions may be determined so that the overfeed rate α of the core yarn is 2 to 15% and the overfeed rate β of the sheath yarn is 5 to 30%.

As a more preferable condition, the yarn pulled out from the take-up roller 11 is wound by the tension roller 12 while being continuously tensioned at an underfeed rate of 0.4α to 0.8α with respect to the overfeed rate α of the core yarn. It is.

In the process of manufacturing the latent loop yarn, the overfeed rate α of the core yarn is 2 to 15%, the overfeed rate β of the sheath yarn is 5 to 30%, and the difference β−α between the two is 3 to 15%. Is good.

This condition is suitable for making small loops and tarmi in the turbulent region.

The latent loop yarn obtained by the above method is a hetero-shrinkage entangled mixed-fiber synthetic filament multifilament composite yarn having fine loops and tarmi on the surface of the yarn, and the number of the fine loops is reduced by heat treatment under no tension. , And the size can be increased.

The above fine loop has a loop A defined below of 30
More than 0 / m, more than 50 loops / m and less than 10 loops C. In hot water of 98 ° C, 10
When heat-treated by free shrinking for one minute, the number of loops B after drying becomes 1.5 times or more the number before the heat treatment, and the number of loops C becomes 50 or more / m.

The loop A, loop B and loop C used here are a photoelectric fuzzy measuring device (TORAY FRAY COUNTER) for measuring the number of loops and the number of fluffs of a running yarn, and the yarn speed is 50 m / min and the running tension is 0.1 g / min. Measured under the condition of d, the number of loops / m protruding 0.15 mm or more from the yarn surface is Loop A, the number of loops / m protruding 0.35 mm or more is Loop B, and the number of loops / m protruding 0.6 mm or more is Loop C. It was done.

In the latent loop yarn obtained by the above method, the multifilament yarn located relatively on the core side is made of a high shrinkage yarn, and the multifilament yarn wound relatively on the sheath side is made of a normal or low shrinkage yarn. And the number and size of loops and tarmi present in the latent loop yarn are small, and the bulk height is relatively small. 0.6mm from the yarn surface
The characteristic feature is that the number of protruding loops and bulges is extremely small, not more than 10 pieces / m, and almost equal to none.

That is, in the state immediately after the yarn has passed through the compressed air turbulent flow region and processed as the entangled mixed fiber composite yarn, the appearance as a bulky yarn is hardly observed.

However, when this latent loop yarn is heat-treated in hot water at 98 ° C for 10 minutes without tension, the core yarn is a high shrinkage yarn,
Since the sheath yarn is a low shrink yarn or a normal shrink yarn, the latent loop yarn itself shrinks.

When the latent loop yarn itself shrinks, the filament of the core yarn constituting the yarn and the filament of the sheath yarn are entangled by entanglement with each other, and the sheath yarn is a normal shrinkage yarn or a low shrinkage yarn. The filament shrinks little, and as the core yarn shrinks, it becomes a loop and a tarmi, forming a bulky latent loop yarn protruding from the yarn surface.

The exposed loop yarn, in which loops and tarmi were exposed by heat treatment, the loop B projecting 0.35 mm or more from the yarn surface increased 1.5 times or more compared to that before treatment, and the loop C projecting from the yarn surface increased to 50 loops / m or more. And significantly increase the bulkiness.

The latent loop yarn thus obtained has latent loops and tarmi during the production of the yarn, and has very few loops C protruding from the yarn surface. Therefore,
Since the bulk of the yarn itself is low and the surface of the yarn is relatively smooth, the running resistance of the yarn is small.

In particular, when used as a warp yarn of a woven fabric, the heddle and the reed can pass well, there is no entanglement between the loops, and no poor opening occurs. Therefore, it can be used for warp yarns of textiles.

At the time of dyeing processing after weaving, heat treatment (drying, moist heat, steaming) is performed alone or in combination with dyeing under high temperature and no tension, thereby revealing loops and tarmi of latent loop yarns. It is possible to obtain a high density and bulky fabric.

Example 1 As a multifilament yarn constituting a core, a polyester-based multifilament yarn 30 having a boiling water shrinkage of 20% was used.
Denier 12 filaments, polyester splittable composite multifilaments 50% denier 36 filaments (sea-island type 3 split, sea component 20%, island component 80%) with 8% boiling water shrinkage as multi-filaments constituting the sheath yarn Using a core yarn overfeed ratio of + 10% and a sheath yarn overfeed ratio of + 18%, supply it to a turbulent nozzle with a compressed air supply of 9ONl / min to make a bulky yarn, and furthermore, an underfeed ratio between the take-up roller and tension roller. Under the condition of −5.6%, tension and latent bulking treatment were performed to obtain an interlaced mixed fiber multifilament composite yarn as shown below.

Fineness 85 denier Boiling water shrinkage 18.5% Loop A 551 pcs / m Loop B 192 pcs / m Loop C 7.8 pcs / m The above composite yarn is wound into small skein and put in boiling water (98 ° C).
After shrinking in a free state for one minute, the small skein was rewound to a bobbin with a thread, and loops A, B, and C were measured in the same manner as before. Loop A 520 pieces / m Loop B 307 pieces / m The number of loop C was 148 / m.

The above-described composite yarn subjected to the potential bulking treatment is made into a warp without twisting, and a 20-denier polyester multifilament yarn having a boiling water shrinkage factor of 20% for the weft, a polyester multifilament yarn having an 8 filament and a boiling water shrinkage factor of 8%. Using a yarn of different densities blended yarn obtained by blending 20 denier 48 filament yarn with an interlace nozzle, twisted with lower twist S-800T / M and upper twist Z-600T / M, density of 110 yarn / 24.5m
It was woven in a water jet loom on a plain weave with m and weft density of 84 / 24.5mm.

Relax the obtained greige (98 ° C), set the middle (18
(0 ° C.) and a 3% solution of caustic soda to remove the sea by 5% weight reduction (weight ratio of the fabric), and then perform dyeing and finishing (160 ° C.) to obtain the following woven fabric.

A high-density woven fabric with a warp density of 129 fibers / 25.4 mm and a weft density of 100 fibers / 25.4 mm.The surface of the woven fabric has a loop of microfibers, and the loop has a unique structure in which a plurality of fine fibers keep the aggregated state. And a high-density woven fabric having an extremely soft touch and a span feeling.

Example 2 Polyester multifilament yarn 50 denier for core yarn
Using 24 filaments, a polyester fiber multifilament yarn having a single fiber fineness of 50 denier and 60 denier was used as the sheath yarn, and entangled and mixed to obtain an entangled mixed fiber multifilament composite yarn. The number of loops (before latent processing), interlacing processability, high-order processing passability (presence or absence of latent processing), and fabric texture (soft touch) of the composite yarn thus obtained were examined. . Table 1 shows the obtained results. The entangled mixed-filament multifilament composite yarn in this example was manufactured using a turbulent nozzle having an overfeed rate of the core yarn of 5%, an overfeed rate of the sheath yarn of 15%, and a compressed air supply amount of 90 Nl / min.

 The following points became clear from the results in Table 1.

First, as for the confounding and blending processability, if the single fiber fineness exceeds 2.8d, the rigidity of the single fiber increases, bending and bending become difficult, and it becomes difficult to form a fine loop. More loops.

On the other hand, when the single fiber fineness is 0.4 d or less, the single fiber breaks easily and becomes fluffy, and the yarn breakage frequently occurs. Therefore, even if the single fiber fineness is large, Not good, there is aptitude, in this example 0.4 to
It can be said that 2.8d is a workable region, preferably in the range of 0.5 to 2.5d.

On the other hand, higher processing passability is related to the number of loops described above,
As the single fiber fineness increases, the number of coarse loops increases,
Phenomena such as a large unwinding resistance and an increase in the fastener effect become strong, and a thinner one is not preferable because fluffing and yarn breakage appear. From this, the range of 0.4 to 2.0 d is good, and the range of 0.5 to 1.3 d is more preferable.

Further, as shown in the higher passability B, the higher passability is improved by performing the latent treatment, and the single fiber fineness is 2.
Applicable even if it becomes 1d.

Finally, the texture (softness of touch) improves as the fineness of the single fiber decreases, but beyond a certain limit, processing of the composite yarn itself becomes impossible.

In the present invention, a splittable conjugate fiber is used for the sheath yarn of the conjugate yarn, and the single fiber fineness of the conjugate fiber is selected so that the conjugate yarn can be appropriately processed. Furthermore, in order to improve the high-order permeability of the composite system, a latent treatment is performed, and then weaving is performed using the composite yarn, the composite yarn is shrunk to a high density, and a plurality of composite fibers are used. By dividing into fine fibers, the texture of the fabric can be improved,
This point can be sufficiently understood in the present embodiment.

[Effects of the Invention] The present invention is configured as described above, and has the following excellent operation which cannot be achieved by the conventional technology.
It shows the effect.

B) The entangled multifilament multifilament composite yarn according to the present invention comprises a multifilament yarn comprising a high shrinkage fiber as a core yarn,
By using a multifilament yarn having a low shrinkage ratio and a splittable composite fiber as the sheath yarn, a fabric having an extremely high density and an extremely soft touch can be obtained.

B) By subjecting the entangled mixed-filament multifilament composite yarn according to the present invention to a bulky latent treatment, a large loop is eliminated from the surface of the yarn, and the composite yarn has a smooth surface that cannot be considered as a bulky yarn. Therefore, since the yarn can be handled in the same manner as a normal yarn, the weaving efficiency can be significantly improved as compared with the case where a conventional bulky yarn is used.

C) Since the bulky woven fabric according to the present invention uses the entangled mixed-filament multifilament composite yarn according to the present invention, the yarn is extremely excellent in shrinkage. It can be a bulky fabric. This shows excellent properties as a cold-protection garment having high water pressure resistance and moisture permeability. Further, the texture of the woven fabric can be made extremely soft by dividing the dividable composite fiber into fine fibers.

D) The properties of these woven fabrics can be arbitrarily adjusted by changing the configuration of the entangled mixed multifilament.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an example of a method for producing a potentially bulky composite yarn used in the present invention. FIG. 2 is a schematic diagram showing the appearance of an interlaced mixed multifilament composite system according to the present invention,
(A) is before the bulkiness making treatment, and (B) is after the bulkiness making treatment. 1: Package, 2: Core thread 3: Supply roller, 4: Processing device 5: Package, 6: Sheath thread 7: Supply roller, 8, 9: Guide 10: Composite thread, 11: Take-off roller 12: Tension roller, 13 : Winding device

Continued on the front page (72) Keitaro Nabeshima, Inventor 3-3-1 Nakanoshima, Kita-ku, Osaka-shi, Osaka Toray Industries, Inc. Osaka Head Office (72) Inventor Akira Ogawa 3-3-1, Nakanoshima, Kita-ku, Osaka, Osaka (56) References JP-A-61-124638 (JP, A) JP-A-53-86875 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) D02G 3 / 34,3 / 04,3 / 22

Claims (5)

(57) [Claims] An entangled multifilament multifilament composite yarn comprising at least two types of multifilament yarns having different hot water shrinkage ratios, and having a mixture of open loops and closed loops protruding on the surface of the yarn. A multifilament yarn composed of a high shrinkage fiber is located on the side, and a dividable composite fiber multifilament yarn having a low shrinkage is located relatively on the sheath side, and constitutes the dividable composite fiber multifilament yarn. The individual filaments are entangled and mixed with other individual filaments constituting the splittable composite fiber multifilament yarn while forming a loop, and constitute the multifilament yarn relatively located on the core side. The individual single fibers are also entangled and mixed, and the open loops and closed loops protruding from the surface of the yarn are mixed with 300 loops A as defined in the text. A multifilament entangled multifilament composite yarn having a configuration of not less than m, not less than 50 loops / m and not more than 10 loops / m. 2. A multifilament yarn comprising a high shrinkage fiber relatively located on the core side has a boiling water shrinkage of 10% or more, and boils with a splittable composite fiber multifilament yarn relatively located on the sheath side. At least 5% difference from water shrinkage
The entangled mixed-filament multifilament composite yarn according to claim 1 or 2. 3. A multifilament yarn composed of high shrinkage fibers located relatively on the core side has a single fiber fineness of 1 to 15 denier, and a splittable composite fiber multifilament yarn located relatively on the sheath side is a single fiber. 4. The entangled mixed-filament multifilament composite yarn according to claim 1, 2 or 3, wherein the fineness is 0.5 to 2.5 denier and the fineness of the divisible microfine fiber contained in the single fiber is 0.4 denier or less. 4. The entangled mixed multifilament composite yarn according to any one of claims 1 to 4, wherein the boiling water shrinkage is at least 10%. 5. A multi-fiber multifilament yarn comprising a high shrinkage fiber and a multi-filament multifilament yarn having a low shrinkage ratio are supplied to the fluid turbulent flow region at different overfeed ratios. Ten loops projecting 0.6 mm or more from the yarn surface after tensioning at the underfeed rate
By performing the bulky latent treatment so as to be less than the number of pieces / m, the former multifilament yarn is relatively positioned on the core side, and the latter filament yarn is relatively positioned on the sheath side, and the open loop or the In a mode in which closed loops are mixed and protruded, each of the individual fibers constituting the splittable composite fiber multifilament yarn forms a loop while forming the splittable composite fiber multifilament yarn. An entangled mixed multifilament composite yarn that is entangled and mixed with individual single fibers and also entangled with individual single fibers constituting the multifilament yarn relatively located on the core side. The mixed fiber multifilament composite yarn is used for the warp and / or the weft or one of them, and then the obtained fabric is shrunk in the longitudinal direction of the interlaced mixed fiber multifilament composite yarn. After closing, the preparation of bulky fabric, characterized in that allowed to split the splittable conjugate fiber to fine fibers.