JP3057980B2 - Different shrinkage yarn - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a different shrinkage mixed fiber yarn. More specifically, it is composed of a split type composite yarn and a high shrinkage yarn which are low shrinkage components, and the segment to be split of the split type composite yarn has an ultrafine fineness and a large number of segments. The present invention relates to a hetero-shrink mixed yarn that can be made into a high-grade woven or knitted fabric having a soft and dense feeling and having swelling, waist, resilience, drape, and the like.

[0002]

2. Description of the Related Art When heat-treated as a woven or knitted material, a different shrinkage mixed yarn obtained by mixing a low shrinkage yarn and a high shrinkage yarn expresses a yarn length difference based on a difference in shrinkage ratio, and the woven or knitted fabric expresses swelling. In addition, it is widely used because a high-grade woven or knitted fabric having a soft feeling and a drape property can be obtained. In addition, various types of polymers, fineness, number of filaments, and cross-sectional shapes are used for the low-shrink yarn and the high-shrink yarn to be mixed.
Woven and knitted fabrics with appearance have been put to practical use. Furthermore, the range of yarns to be mixed to expand the characteristics of the woven or knitted fabric is expanding one after another.

The inventors of the present invention have previously described, for example, Japanese Patent Application Laid-Open Nos.
Japanese Patent Application No. 59130/59 proposed an improvement from a polymer in order to provide a large difference in shrinkage or a dry touch. However, the fineness configuration is a general one of about 1 to 3d of ordinary clothing filaments, and it was not possible to obtain a soft, dense and high-quality feel.

It is also widely practiced that the fineness of the single yarn of the low shrinkage yarn is fine and the fineness of the single yarn of the high shrinkage yarn is thick, thereby emphasizing softness, waist and tension. In other words,
No. 19730 discloses a low shrinkage component of less than 1d and 1-3
Although a mixed fiber with the high shrinkage component of d is disclosed, there is a disadvantage that the fineness of the high shrinkage component is small and the woven or knitted fabric cannot be sufficiently imparted with firmness and resilience. In addition, Japanese Patent Publication No. 61-4077
No. 8 discloses a technique of raising a woven or knitted fabric into a raised fabric by using a mixed yarn of a low shrinkage yarn having an ultrafine size and a high shrinkage yarn having a large fineness. Here, there is also a description that the low shrinkage yarn may be a split type composite yarn, but in the technology disclosed herein, only the example in which the ratio of the number of filaments of the ultrafine yarn to the thick yarn is twice is used. At most twice, filaments of each fineness form a group and form a surface, so that the surface of the obtained woven or knitted fabric has a slightly soft feeling.
Even if the hair was raised, good fluffiness and appearance quality could not be obtained.

On the other hand, Japanese Unexamined Patent Publication (Kokai) No. 52-91962 discloses a sea-island composite yarn having an island component having an extra fine fineness, a shrinkage difference is imparted to the yarn, the fiber is mixed, the sea component is removed from the woven fabric, and the nap is raised. However, this kind of woven fabric has a drawback that it has a too soft feeling and can be developed only for a special use even when it is not raised.

[0006] As described above, in the prior art, a different shrinkage mixed fiber yarn in which a low shrinkage yarn is a split type composite yarn is known, but when it is formed into a woven or knitted fabric, it has a sufficiently soft and dense feeling, and swells. A luxurious woven or knitted fabric that has both the texture and the appearance quality has not yet been obtained.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks of the prior art, and to provide softness, waist, tension and drapability, especially for woven and knitted fabrics having a sufficiently high quality feeling. An object of the present invention is to provide a shrinkage-differentiated mixed yarn having characteristics that could not be achieved by conventional techniques, such as a dense appearance without defects.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a yarn of different shrinkage of a split type composite yarn having a low shrinkage component and a high shrinkage yarn, wherein the fineness of a segment to be split of the split type composite yarn is small. 0.05-0.5d, the fineness of the single yarn of the high shrinkage yarn is 4-1
0d, wherein the number of filaments of the split type composite yarn is at least four times the number of filaments of the high shrinkage yarn, and the number of segments to be split is at least 20 times the number of filaments of the high shrinkage yarn. This can be achieved by using a different shrinkage mixed fiber.

Hereinafter, the configuration of the present invention will be described in detail. First, the different shrinkage mixed yarn of the present invention is composed of a split type composite yarn which is a low shrinkage component and a high shrinkage yarn. The split type composite yarn is a composite yarn having a cross-sectional shape in which a component polymer to be split is divided into a plurality of segments by a component polymer. The split component polymer is preferably an easily soluble polymer in order to make the splitting process more reliable, but may be a composite yarn that can be used after the splitting process. Further, as the split type composite yarn, a sea-island type composite yarn is preferable from the viewpoint of stably making the segment to be split into ultrafine fineness. FIG. 1 illustrates a cross-sectional shape of a sea-island type splittable composite yarn. In the figure, a split component polymer 1 is divided into eight island-shaped split segments 1 by a split component polymer 2.

The fineness of the segment to be divided is 0.05-0.
It must be 5d. The segment to be split after the splitting process forms the surface of the woven or knitted fabric and is directly related to the feeling and appearance, and the fineness thereof is 0.5 d or less, preferably 0.4 d or less, from the viewpoint of exhibiting a soft feeling and a dense feeling. The following is required: Further, if the fineness of the segment to be divided is too small, the soft feeling is emphasized too much, resulting in a slimy texture. Therefore, 0.05d or more, preferably 0.06d or more is required.

The split type composite yarn has a low shrinkage component in the mixed yarn, while the high shrinkage yarn which is a high shrinkage component has a single yarn fineness of 4%.
To 10d. In order to impart sufficient waist, tension and resilience to a woven or knitted fabric composed of mixed fibers, 4
d or more, preferably 5d or more. Also, if the single yarn fineness is too large, the woven or knitted fabric has a rough and hard feel, so that it needs to be 10d or less, preferably 9d or less. In order to emphasize softness, waist, tension, and resilience at the same time, it is preferable that the single yarn fineness of the high shrinkage yarn be 15 times or more the fineness of the segment to be divided.

The number of filaments of the split type composite yarn must be at least four times the number of filaments of the high shrinkage yarn, and the number of segments to be split must be at least 20 times the number of filaments of the high shrinkage yarn. Number of filaments of split composite yarn (B
The smaller the F number) and the number of segments to be divided (the number of BSs), the lower the surface formation ratio of the segments to be divided in the woven or knitted fabric composed of the mixed yarns after the division, and the softness and the denseness are reduced. For this reason, the number of BFs is at least 4 times, preferably at least 5 times, the number of filaments (KF number) of the high shrinkage yarn from the viewpoint of improving the softness and denseness of the woven or knitted fabric and reducing dyeing irritation. The number must be at least 20 times, preferably at least 25 times the KF number.

The shrinkage characteristics of the splittable composite yarn (low shrinkage component yarn) and the high shrinkage yarn are determined by either shrinkage of boiling water or shrinkage by dry heat at 160 ° C. in order to develop swelling as a different shrinkage mixed fiber yarn. On the other hand, it is preferable that there is a difference of 5% or more,
More preferably, there is a difference of 7% or more. Further, in order to impart sufficient swelling to the woven or knitted fabric, the boiling water shrinkage of the high shrinkage yarn should be 15% or more, the boiling water shrinkage of the split type composite yarn should be 10% or less, and the difference between the two shrinkage ratios is 7%. % Is more preferable.

The polymer constituting the hetero-shrinkage mixed fiber of the present invention is characterized in that the difference in shrinkage due to heat treatment can be easily converted into the swelling of the yarn or woven or knitted fabric, and that the drape property is imparted to the woven or knitted fabric by alkali dissolution treatment or the like. From the viewpoints of ease and dimensional stability, polyester polymers are preferred, and among the constituent polymers other than the splitting component, polyesters having substantially 80 mol% or more of ethylene terephthalate and substantially polyethylene terephthalate are most preferred.

[0015] Among the different shrinkage mixed fibers, the polyester polymer constituting the high shrinkage yarn is preferably a polyester obtained by copolymerizing a third component. The third component includes, for example, oxalic acid,
In addition to dicarboxylic acids such as sebacic acid, phthalic acid and isophthalic acid, and glycols such as diethylene glycol, polyethylene glycol and neopentyl glycol, bisphenol A and bisphenol sulfone are included. From the standpoint, isophthalic acid and bisphenol A are particularly preferred. Further, the copolymerization amount of the third component is preferably 2 mol% or more in order to sufficiently impart high shrinkage properties. If the copolymerization amount is too large, the woven or knitted fabric tends to become coarse and hard in the shrinkage difference imparting treatment. It is preferable to keep it at 20 mol% or less.

When a matting agent is added to the polymer constituting the segment to be split and / or the high shrink yarn, a soft texture can be obtained. It is preferable because a knitted fabric can be obtained.
The effect is further enhanced when added to both component polymers. For this purpose, the amount of the matting agent added is preferably 1.2% by weight or more, more preferably 1.4% by weight or more. On the other hand, if the addition amount is too large, the spinnability deteriorates and the yarn strength is liable to decrease, so the content is preferably 10% by weight or less, more preferably 4% by weight or less.

The matting agent includes, for example, titanium oxide, zirconium oxide, magnesium oxide, silicon oxide, antimony oxide, zinc oxide, lead tungstate, calcium tungstate, and calcium carbonate. Titanium oxide, silicon oxide, zinc oxide, calcium carbonate, and the like are particularly preferable from the viewpoint that they can be added. The average particle size of the matting agent to be added is preferably 1 μm or less, more preferably 0.7 μm or less from the viewpoint of dispersibility. Further, the maximum particle size is preferably 5 μm or less, more preferably 3 μm or less from the viewpoint of spinning properties.

It is preferable that the high shrinkage yarn has a shape having a concave groove continuous on the surface in the yarn longitudinal direction. Woven and knitted fabric composed of different shrinkage mixed fiber yarns using high shrinkage yarns of such a shape has both a feeling of squeaky feeling and water absorption function, and is soft, squeaky feeling and water absorption unlike conventional products A woven or knitted fabric having a certain quality can be obtained. It is preferable to form a plurality of concave grooves from the viewpoint of clearly forming the concave grooves. The high shrinkage yarn preferably has a cross-sectional shape in which the easily soluble component polymer is tapered from a plurality of locations on the surface toward the inside of the yarn. The high shrinkage yarn having such a cross-sectional shape,
When at least a part of easily soluble components is dissolved and removed after weaving and knitting, a woven and knitted fabric with a unique soft feeling and water absorbing function, which is unique to conventional products, is obtained. Will be done. FIG. 2 shows an example of a cross-sectional shape of such a high shrinkage composite yarn. This is a high shrinkage composite yarn having a shape in which readily soluble components are tapered from the three convex portions of the trilobe cross section toward the inside of the yarn. That is, the high-shrink composite yarn of FIG. 2 is formed of three tapered segments 3 and a high-profile segment 4, and the high-profile segment is composed of a high-shrink component polymer.

The high-shrink composite yarn further has an average length of the entrance width of the concave groove on the surface of the yarn and / or a line connecting the tapered segment of the yarn surface and the boundary point of the high-profile segment (the taper of the high-profile segment). Assuming that the average length of the groove-shaped groove is equal to W, and W is larger than the average diameter R of the segment to be divided (the average value of the maximum diameter in the case of an irregular shape), a high shrinkage yarn is used in the woven or knitted fabric. The segment to be divided easily enters the groove, and the groove effect and the effect of the fineness of the segment to be divided tend to be reduced. For this reason, W / R is preferably 5 times or less, more preferably 4 times or less, and still more preferably 3 times or less from the viewpoint of sufficiently exhibiting the groove effect and the fineness effect.

The readily soluble component polymer of the high shrink composite yarn does not need to be the same as the easily soluble component polymer of the split composite yarn described above, but it is preferable from the viewpoint of productivity if it is the same. For the dissolving treatment of the easily soluble component polymer, an alkali treatment widely used in polyester woven or knitted fabric can be suitably used. For this reason, the easily soluble component polymer is preferably an alkali easily soluble polyester.

The alkali-soluble polyester includes:
For example, a copolymer or blend of a polyester and a polyalkylene glycol, a polyester to which an anionic surfactant has been added, a polyester having a metal sulfonate group, or a blend of a polyester and a polyester having a metal sulfonate group. Can be Among them, metal sulfonate group-containing polyesters, specifically, 5-sodium sulfoisophthalate (1 to 10 mol%) / ethylene terephthalate (9
(9 to 90 mol%) is particularly preferred.

As the easily soluble component polymer, particularly, a hot water-soluble polyester such as 5-sodium sulfoisophthalate (8 to 14 mol%) / isophthalic acid (10 to 10 mol%)
The use of a copolymer polyester composed of (33 mol%) / ethylene terephthalate (82 to 45 mol%) significantly reduces the restrictions during the dissolution treatment, and in particular, reduces the strength reduction due to the dissolution treatment of the mixed fiber. It is convenient.

In the hetero-shrink mixed yarn (multifilament) of the present invention, the split type composite yarn is arranged outside the hetero-shrink mixed yarn and the high shrink yarn is arranged further inside, so that the segment to be split is different. This is preferable from the viewpoint of exerting the effect of fineness and the effect of reducing dyeing irritation. In order to form such an arrangement of mixed yarns, it is preferable to simultaneously spin the splittable composite yarn and the high shrinkage yarn as in the spinning method described below. It is more preferable that the discharge holes of the high-shrinkage yarn are arranged further inside and the spinning is performed.

Next, a spinneret for simultaneously spinning the split type composite yarn and the composite high shrinkage yarn in the different shrinkage mixed fiber yarn of the present invention will be described with reference to FIG. The base device shown in FIG. 3 is composed of two plates, an upper plate 11 and a lower plate 12,
The left half is for a sea-island type split composite yarn as shown in FIG. 1, and the right half is for a trilobal cross-section composite high shrink yarn as shown in FIG. First, the composite spun portion of the sea-island split composite yarn will be described. The component polymer A for the segment to be split has an introduction hole 13,
It is introduced into the opening 17 from the upper plate discharge hole 14. Inlet 1
3. The number of upper plate discharge holes 14 corresponds to the number of segments (islands) to be divided. The split component polymer B is introduced from the polymer reservoir 15 to the opening 17 through the projection 16, where it forms a sea-island composite flow, and is discharged from the discharge hole 18 as a sea-island split composite yarn. Next, the composite spun portion of the trilobe cross-section composite high shrinkage yarn will be described. The component polymer C for highly deformed segments is introduced into the opening 24 from the opening 19 and the upper plate discharge hole 20. On the other hand, the tapered segment component polymer D is supplied from the polymer reservoir 21 through the groove 23 on the projection 22 to the opening 2.
4, where a composite stream is formed and discharged from the discharge holes 25 as a three-lobed cross-section composite high shrinkage yarn. Upper plate discharge hole 2
Preferred shapes of the groove 0, the groove 23, and the discharge hole 25 are shown in FIGS. Note that the component polymer A for the segment to be divided and the component polymer B are divided by the partition plate 26,
The component polymer C for the highly deformed segment and the component polymer D for the tapered segment are separated by a partition plate 27.

As a matter of course, the different shrinkage mixed yarn may be spun and stretched from a separate die for the split type composite yarn and the high shrinkage yarn, and then mixed. Spinning and stretching may be performed in separate steps or continuously, and a high-speed spinning method can be sufficiently applied.

The hetero-shrinkage mixed fiber yarn of the present invention is knitted or woven or dyed to form a woven or knitted fabric, and the mixed fiber is preferably used for at least one of the warp and the weft of the woven or knitted fabric. It is more preferable to use it for all of the warp and weft in order to sufficiently exert the above. The woven or knitted fabric has 50
% Or more is preferably composed of the mixed fiber, and more preferably composed entirely of the surface. Further, it is a matter of course that the mixed fiber can be subjected to yarn processing such as twisting and entanglement as long as the effects of the present invention cannot be prevented.

The easily soluble component polymer in the mixed fiber is subjected to a usual dissolution treatment, but the treatment is most effective after weaving and weaving, and is also effective in expressing a difference in shrinkage. It is. Of course, the dissolving treatment of the easily soluble component can be performed with the mixed fiber.

[0028]

The present invention will be specifically described below with reference to examples. Example 1 TiO ₂ was used as the component polymer A for the segment to be divided.
Polyethylene terephthalate (intrinsic viscosity: 0.65) added with 0 wt%, polyethylene terephthalate copolymerized with 13 mol% of 5-sodium sulfoisophthalic acid and 25 mol% of isophthalic acid as a dividing component polymer B and a component polymer D for a tapered segment (25 mol%) Intrinsic viscosity 0.6
3) Polyethylene terephthalate prepared by copolymerizing 10% by mole of isophthalic acid and adding 2.0% by weight of TiO ₂ as component C for a highly deformed segment.

Using a composite die shown in FIGS. 3 to 6, a split type composite yarn composed of component polymer A and component polymer B and a composite high shrinkage yarn composed of component polymer C and component polymer D were simultaneously spun and mixed. The composite spinneret having five discharge holes for composite high shrinkage yarn in the center part and 24 discharge holes for split type composite yarn in the peripheral part was used and spun at a spinning speed of 1300 m / min. The ratio of component polymer A to component polymer B is 80/20
The sectional shape of the split composite yarn is as shown in FIG.
On the other hand, the ratio of the component polymer D to the component polymer C is 20/80.
The cross-sectional shape of the composite high shrinkage yarn is as shown in FIG. The blended composite undrawn yarn is drawn at 800 m / min at 140 ° C.,
30D-5F split type composite yarn having a boiling water shrinkage of 9%;
A different shrinkage mixed yarn comprising a composite high shrinkage yarn having a boiling water shrinkage of 18% of D-24F was obtained. The fineness of the segment to be split of the split type composite yarn is 0.22d. In this mixed fiber, the composite high shrinkage yarn component was distributed relatively toward the center.

The above-described different shrinkage mixed fiber yarn was twisted at 200 T / M for both warp and weft, and was made into a plain weave using warp and weft.
The component polymer B and the component polymer D are dissolved and removed with hot water of 98 ° C., and a difference in shrinkage is developed. Then, a dry heat treatment is performed at 180 ° C. to further develop a difference in shrinkage. Was given.

The obtained plain woven fabric is soft and excellent in denseness.
The fabric was good in swelling, waist, resilience, and drapability, and was luxurious. The mixed yarn constituting the woven fabric had a high shrinkage yarn component at the center of the yarn and a low shrinkage segment to be divided at the outer periphery, and had a uniform appearance with little dyeing and irritation. In addition, the entrance width of the groove of the high shrinkage yarn is 6.2 μm, and the diameter of the segment to be divided is 4.7 μm.
m, which was 1.3 times that of the high-shrink yarn of the segment to be split.

Example 2 The split type composite yarn and the composite high shrinkage yarn in Example 1 were spun by using separate spinnerets, stretched, and the drawn yarn was combined with the yarn.
Twisting of 00 T / M was performed to obtain a different shrinkage mixed fiber. Subsequently, the fabric was finished in the same manner as in Example 1. Compared with the woven fabric of Example 1, the high shrinkage filaments and the segments to be divided in the mixed yarn constituting the woven fabric are grouped, and the softness and the denseness are slightly small, and the appearance quality is slightly increased. It was inferior.

[0033]

The different shrinkage mixed yarn of the present invention is a mixed yarn of a split type composite yarn having a low shrinkage component and a high shrinkage yarn having a large fineness. It has a fine fineness and a multi-segment count.
A high-quality woven or knitted fabric having swelling, waist, resilience, drape and the like can be obtained.

The blended yarn is soft and smooth by improving the arrangement of the constituent polymers, that is, for example, by arranging the easily soluble component polymer from the surface of the highly shrinkable yarn toward the inside of the yarn. It can be provided with a unique texture. Furthermore, if the cross-sectional shape of the high shrinkage yarn is made highly irregular, it is possible to give a feeling of creaking and water absorption. Furthermore, when a hot-water-soluble polymer is used as the easily soluble component polymer, restrictions during the dissolution treatment are significantly reduced, and in particular, a decrease in strength due to the dissolution treatment of the woven or knitted fabric or its original yarn can be greatly suppressed.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a cross-sectional shape of a splittable composite yarn in the present invention.

FIG. 2 is a view showing an example of a cross-sectional shape of a high shrinkage composite yarn in the present invention.

FIG. 3 is a schematic view showing one example of a spinneret device for producing a different shrinkage mixed fiber in the present invention.

4 is a view showing a shape of an upper plate discharge hole of a portion for a high shrinkage composite yarn in the spinneret device of FIG. 3;

5 is a view showing a shape of a groove for inflow of a D component provided on an upper portion of a lower plate of a portion for a high shrinkage composite yarn in the die device of FIG.

6 is a view showing a shape of a discharge hole of a composite yarn provided in a lower portion of a lower part of a portion for a high shrinkage composite yarn in the die device of FIG. 3;

[Explanation of symbols]

 1: Segment to be divided 2: Split component 3: Tapered segment 4: Highly deformed segment 11: Upper plate 12: Lower plate 13: Inlet hole 14: Upper plate discharge hole 15: Polymer reservoir 16: Projection 17: Opening 18: Lower plate discharge hole 19: Opening portion 20: Upper plate discharge hole 21: Polymer reservoir 22: Projection portion 23: Groove 24: Opening portion 25: Lower plate discharge hole 26: Partition plate 27: Partition portion A: Cover Component polymer for segmented segment B: Component component polymer C: Component polymer for highly deformed segment D: Component polymer for tapered segment

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-263330 (JP, A) JP-A-2-307926 (JP, A) JP-B 61-40778 (JP, B2) (58) Field (Int.Cl. ⁷ , DB name) D02G 1/18 D02G 3/04 F-term theme code 4L036

Claims (7)

(57) [Claims] In a hetero-shrink mixed yarn composed of a split type composite yarn having a low shrinkage component and a high shrinkage yarn, the split segment of the split type composite yarn has a fineness of 0.05 to 0.5 d. The single yarn fineness of the high shrinkage yarn is 4 to 10d, the number of filaments of the split type composite yarn is at least four times the number of filaments of the high shrinkage yarn, and the number of segments to be split is the number of filaments of the high shrinkage yarn. A differently shrinkable mixed yarn characterized by being at least 20 times as large as the above. 2. The differently shrinkable mixed yarn according to claim 1, wherein the yarn constituting the differently shrinkable mixed yarn is polyester. (3) Each of the polymers constituting the split segment of the split type composite yarn and / or the high shrinkage yarn has a matting agent of 1.2 or less.
The mixed-shrink mixed yarn according to claim 1, which contains 10 to 10% by weight. 4. The hetero-shrink mixed yarn according to any one of claims 1 to 3, wherein the surface of the high shrink yarn has a concave groove continuous in the yarn longitudinal direction. 5. The hetero-shrinkable blend according to claim 1, wherein the highly shrinkable yarn has a cross-sectional shape in which the easily soluble component polymer is tapered from a plurality of positions on the surface toward the inside of the yarn. Thread. 6. The hetero-shrinkable mixed fiber according to any one of claims 1 to 5, wherein the polymer constituting the split component of the split type composite yarn and / or the tapered segment of the high shrinkage yarn is a hot water-soluble polyester. yarn. 7. The different shrink mixed yarn according to any one of claims 1 to 6, wherein the split type composite yarn and the high shrink yarn are spun from the same die and are compounded.