JPH08284034A - Blended yarn with fiber of different shrinkage - Google Patents

Abstract

PURPOSE: To obtain a blended yarn extremely rich in color developing properties, having a dry touch and soft feelings without a defect such as irritative dyeing, etc., and having an elaborate feeling as woven and knitted fabrics, and capable of forming woven and knitting fabrics having bulkiness, stiffness, resilience and draping property simultaneously and rich in high grade feeling. CONSTITUTION: This blended yarn with fibers having different shrinkages constituted by a dividing-type composite yarn of a low shrinkage yarn with a high shrinkage yarn, comprises providing the divided segment of the dividing-type composite yarn consisting of a basic dye dyeable polymer having 0.05-0.5d fiber thickness, a divided component polymer having hot water-soluble properties, the high shrinkage yarn having 4-10d monofilament thickness, the number of filaments of the dividing-type composite yarn having >=4 times of the number of filaments of the high shrinkage yarn and the number of divided segments having >=20 times of the number of filaments of the high shrinkage yarn. By making the polymer sequences constituting the blended yarn to a higher degree or the shape of cross sections of the high shrinkage yarn to a higher modification, high dignity and high quality woven and knitted fabrics having further soft and light specific touch feeling, etc., are obtained.

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 yarn. More specifically, it is composed of a low-shrinkage yarn and a high-shrinkage yarn made of a basic dye-dyeable polymer, and at least the split component of the split-type composite yarn, which is a low-shrinkage yarn, is soluble in hot water and The segments have ultrafine fineness and a large number of segments, and when formed into a woven or knitted material, they are extremely excellent in color development, have a dry touch, and are soft and dense,
The present invention relates to a heterogeneous-shrink mixed yarn that can be a high-quality woven or knitted fabric having bulges, waists, resilience, drapability, and the like.

[0002]

2. Description of the Related Art When a heat-treated woven or knitted yarn is produced by mixing a low shrinkage yarn and a high shrinkage yarn, the different shrinkage mixed yarn causes a difference in yarn length based on the difference in shrinkage ratio, and the woven or knitted fabric develops a bulge. In addition, it is widely used because high-quality woven and knitted fabrics with softness and drape are obtained. As for the low shrinkage yarns and high shrinkage yarns to be mixed, various polymers, fineness, number of filaments and cross-sectional shape are used, and various textures,
Woven and knitted goods with an appearance have been put to practical use. Furthermore, the range of raw yarns to be mixed to expand the characteristics of woven and knitted fabrics is expanding one after another.

With respect to such a different shrinkage mixed yarn, for example, in JP-A-2-19528 and JP-A-3-59130, improvements from polymers have been made to give a large difference in shrinkage and a dry touch. Proposed. However, the fineness is a general one of the usual filaments for clothes of about 1 to 3 d, and high coloring property and dry feeling are insufficient, and it is not possible to obtain a soft and high-quality texture with a dense feeling.

It is also widely practiced that the single yarn fineness of the low shrinkage yarn is the fineness and the single yarn fineness of the high shrinkage yarn is the large fineness to emphasize the softness, waist and tension. That is, Japanese Patent Publication 6
No. 1-19730 discloses a low shrinkage component of less than 1d and 1 to
Although a 3d high-shrinkage component mixed fiber is disclosed, the fineness of the high-shrinkage component is small, and it is not possible to impart sufficient elasticity and repulsion to the woven or knitted fabric, as well as high coloring and dry feeling. There is. Further, Japanese Patent Publication No. 61-40778 discloses a technique in which a woven or knitted fabric is raised to a raised fabric by using a mixed yarn of a low shrinkage yarn having an ultrafine fineness and a high shrinkage yarn having a large fineness. Although there is a description here that the low-shrinkage yarn may be a split-type composite yarn, in the technique disclosed here, the ratio of the number of filaments of the ultrafine-fine yarn to the large-fineness yarn is at most twice, and Since the filaments of different fineness form a group and form the surface, the surface of the woven or knitted fabric lacks a soft feeling, and causes not only an uneven defect with a large difference in dyeing due to the difference in fineness, but also a good fluff feeling even when raised. However, the appearance quality was not obtained, and the color development and dry feeling were insufficient.

On the other hand, JP-A-52-91962 discloses that a sea-island composite yarn having an island component with an extremely fineness is mixed to give a shrinkage difference, and the sea component is removed from the woven fabric, and the napped woven fabric is raised. However, there is a case that this kind of woven fabric is too soft and does not nap, and even in this case, it has a drawback that it can be developed only for a special purpose.

On the other hand, a basic dyeable polyester is well known as a polymer having excellent color developability. Conventionally, as a basic dyeable polyester, a copolymer obtained by copolymerizing an isophthalic acid component having a metal sulfonate group, for example, 5-sodium sulfoisophthalic acid component is known from Japanese Patent Publication No. 34-10497.

However, in order to raise the color development to a satisfactory level, this product must be a copolymer of a large amount of an isophthalic acid component having a metal sulfonate group (hereinafter abbreviated as S component). A polymer obtained by copolymerizing a large amount of the S component has a high solution viscosity when the polymer has a degree of polymerization required as a fiber because of the thickening effect of the S component, making spinning difficult. Therefore, in order to spin a polymer obtained by copolymerizing a large amount of S component by a usual method, it is necessary to lower the degree of polymerization of the polymer in order to reduce the melt viscosity to a range in which it can be normally spun. However, as a result, there have been drawbacks that the yarn strength is lowered, the yarn-forming property and the ability to pass through high-order processes are lowered, and the use is limited.

[0008] Splittable conjugate fibers obtained by splitting a hardly soluble polyester into a plurality of soluble polyesters are widely used by taking advantage of the ability to obtain ultrafine fibers by dissolving and removing the soluble polyester. It is also known that when the soluble polyester is dissolved and removed from the composite fiber in which the soluble polyester is arranged at a specific position on the fiber surface, a deformed cross-section fiber having a large degree of deformation that cannot be obtained by a usual spinning method can be obtained. .

For such composite fibers, alkali weight reduction processing, which is usually used in the field of polyester fiber woven and knitted fabrics, is preferably applied as a dissolution removal treatment of soluble polyester. As the soluble polyester, an alkali easily soluble polyester is used, and as the alkali easily soluble polyester, it is general to use a polyester obtained by copolymerizing polyethylene terephthalate with 5-sodium sulfoisophthalic acid. 54-6965, Japanese Patent Publication 62-61686, etc.).

On the other hand, for the above-mentioned composite fiber, a soluble polymer which is soluble only in hot water without using an alkali has been proposed, but a polyester obtained by copolymerizing polyethylene terephthalate with 5-sodium sulfoisophthalic acid is basically used. (For example, Japanese Patent Publication No. 64-6286).

However, the soluble polyester copolymerized with 5-sodium sulfoisophthalic acid has an increased alkali solubility or hot water solubility with an increase in the copolymerization amount, but it becomes difficult to stretch in the stretching step, and the stretching It is necessary to set the magnification low. Even in the composite fiber containing the soluble polyester obtained by copolymerizing 5-sodium sulfoisophthalic acid as one component, the draw ratio must be similarly set low. However, the strength of the composite fiber is low, and the strength of the fiber after the soluble polyester is dissolved and removed is also low. When the strength of the composite fiber is low, there are many yarn breakages and fluffs in the yarn making process and the weaving and knitting process.
The quality of the obtained woven or knitted product also becomes poor. Further, if the strength of the fiber after the soluble polyester is dissolved and removed is small, the tear strength of the woven or knitted material is small, and in this respect also, the practicality is poor. In particular, in a composite fiber in which a soluble polyester is placed at a specific position on the fiber surface, if the strength of the deformed cross-section fiber obtained by dissolving and removing the soluble polyester is low, the cross-sectional shape is deformed due to fibrillation or external force, which is large. However, the drawbacks derived from this increase, resulting in a further impracticality.

[0012]

SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned drawbacks of the prior art, and particularly for woven and knitted fabrics having a sufficiently high-class feeling, high coloring property, dry feeling, soft feeling, waist / tension and drape. The object of the present invention is to provide a shrinkage-differential mixed yarn having characteristics that could not be achieved by the prior art, such as a dense appearance without irritating defects, as well as the properties.

[0013]

The above object of the present invention is to provide a different-shrink mixed yarn composed of a low-shrinkage yarn and a high-shrinkage yarn, which is a splittable composite yarn, in which the segment to be split of the splittable composite yarn is Basic dye dyeable polymer with fineness of 0.
05-0.5d, at least the split component of the split-type composite yarn is a hot water-soluble component, and the single yarn fineness of the highly shrinkable yarn is 4 to 10d.
And the number of filaments of the splittable composite yarn is 4 times or more the number of filaments of the high shrinkage yarn, and the number of divided segments is 20 times or more of the number of filaments of the high shrinkage yarn. This can be achieved by the different shrinkage mixed yarn.

The structure of the present invention will be described in detail below. First, the different shrinkage mixed yarn of the present invention is composed of a split type composite yarn (A) which is a low shrinkage yarn and a high shrinkage yarn (B). The splittable composite yarn is a composite yarn having a cross-sectional shape in which the divided component polymer is divided into a plurality of divided segments by the divided component polymer. This split component polymer must be at least a hot water soluble polymer. Further, as the splittable composite yarn, the sea-island type composite yarn is preferable from the viewpoint that the segment to be split is stably made to have an ultrafine size. FIG. 1 exemplifies a cross-sectional shape of a sea-island splittable composite yarn. In the figure, a split component polymer 1 is divided by a split component polymer 2 into eight island-shaped split segments 1.

The fineness of the segment to be divided is 0.05 to 0.
It needs to be 5d. The segment to be divided after the division treatment forms the surface of the woven or knitted fabric and is directly related to the feel and appearance, and the fineness thereof is 0.5d or less, preferably 0.4d or less from the viewpoint of exhibiting a soft feeling and a dense feeling. Is required. Also, if the fineness of the segment to be divided becomes too small, the soft feeling will be emphasized too much and it will have a slimy feel,
0.05d or more is required, and preferably 0.06d or more.

The split type composite yarn has a low shrinkage component in the mixed yarn, but the high shrinkage yarn, which is one of the high shrinkage components, has a single yarn fineness of 4
It is necessary to set to 10d. 4 is required to give sufficient elasticity, tension and resilience to a woven or knitted fabric made of mixed fiber.
d or more is necessary, and preferably 5d or more. Further, if the single yarn fineness becomes too large, the woven or knitted fabric will have a coarse and hard texture, so 10 d or less is necessary, and preferably 9 d or less. In order to enhance the softness, the elasticity and the elasticity, and the resilience, it is preferable that the single yarn fineness of the high shrinkage yarn is 15 times or more the fineness of the segment to be divided.

The number of filaments of the splittable composite yarn must be at least 4 times the number of filaments of the high shrinkage yarn, and the number of divided segments must be at least 20 times the number of filaments of the high shrinkage yarn. Number of filaments of split type composite yarn (B
The smaller the number of F) and the number of divided segments (the number of BS), the lower the surface formation ratio of the divided segments in the woven or knitted fabric made of the mixed yarn after the division treatment, and the softer or denser feeling. Therefore, from the viewpoint of improving the softness and denseness of the woven or knitted fabric and reducing the feeling of uneven dyeing, the BF number needs to be 4 times or more, and preferably 5 times or more, the number of filaments (KF number) of the high shrinkage yarn. , And the number of BS is 20 which is the number of KF
It is necessary to double or more, preferably 25 times or more.

The shrinkage characteristics of the splittable composite yarn (low shrinkage yarn) and the high shrinkage yarn are either boiling water shrinkage ratio or 160 ° C. dry heat shrinkage ratio in order to develop swelling as a different shrinkage mixed yarn. It is preferable that there is a difference of 5% or more, and 7%
It is more preferable that there is the above difference. Furthermore, in order to impart a sufficient bulge to the woven or knitted fabric, the boiling water shrinkage of the high shrinkage yarn is 15% or more, and the boiling water shrinkage of the split type composite yarn is 10%.
It is more preferable that the ratio is less than or equal to%, and the difference between both shrinkage ratios is equal to or more than 7%.

Next, the polymer composition constituting the different shrinkage mixed yarn of the present invention will be explained. The polymer constituting the different shrinkage mixed yarn of the present invention is capable of easily converting the difference in shrinkage due to heat treatment into a bulge of a yarn or a woven or knitted fabric, having easy care property, excellent in dimensional stability, and imparting drapeability. A polyester polymer is preferable because it is easy to use. As will be described in detail below, a polyester resin is also preferable as the low shrinkage polymer capable of dyeing a basic dye, the high shrinkage polymer, the split component polymer, and the polymer used for the tapered segment.

First, the basic dye-dyeable low shrinkage polymer will be described. As described above, the low-shrinkage yarn is divided by the hot water-soluble polymer and finally becomes an ultrafine yarn of 0.5 d or less, so that the ordinary polyester has insufficient clear color-forming property. Therefore, the basic dye-dyeable polymer having good colorability used in the present invention will be described. The basic dye-dyeable polymer means an isophthalic acid component containing a metal sulfonate group in an amount of 0.7 to 2.4 mol% and a molecular weight of 90 to 6000 polyalkylene glycol component (hereinafter abbreviated as G component) based on the total dicarboxylic acid component. ) Is 0.2 to 10 relative to polyester.
It needs to be copolymerized by weight, and is preferably formed of a modified polyester having an intrinsic viscosity (IV) of 0.64 or more.

The modified polyester has a higher yarn strength than that obtained by copolymerizing a large amount of the S component to enhance the dyeability, and exhibits good color development and light resistance to a basic dye. The S component is a compound represented by the following formula, specifically, dimethyl (5-sodium sulfo) isophthalate, bis-2-hydroxyethyl (5-sodium sulfo) isophthalate, bis-4-hydroxybutyl ( Examples include 5-sodium sulfo) isophthalate and dimethyl (5-lithium sulfo) isophthalate.

[0022]

Embedded image (However, in the formula, M represents an alkali metal such as Na, Li, and K, and A and A ′ are hydrogen, an alkyl group, or — (CH ₂ ).
nOH and n represents an integer of 2 or more) Preferred S components are dimethyl (5-sodium sulfo) isophthalate and bis-2-hydroxyethyl (5-sodium sulfo) isophthalate. S
It is preferable that 0.7 to 2.4 mol% of the component is copolymerized with the modified polyester acid component. If the copolymerization amount is less than 0.7 mol%, the dyeing property and color developability of the fiber with the basic dye are insufficient, and if it exceeds 2.4 mol%, the melt viscosity becomes remarkably large, so that it is suitable for melt spinning. Filtration is not possible, resulting in low yarn strength.

The G component has a molecular weight of 90 to 6000.
It is desirable that When the molecular weight is less than 90, the dyeing and coloring properties of the fiber are insufficient at a copolymerization amount that satisfies the light resistance, and because the molecular weight is low, the melting point of the modified polyester is low. Higher-order workability becomes poor.

On the other hand, since it is difficult to uniformly copolymerize the G component having a molecular weight of more than 6000 in the modified polyester, the dyeing property and color developability of the obtained fiber are insufficient at a copolymerization amount that satisfies the light resistance. Further, there are disadvantages such that the resistance to oxidative decomposition of the modified polyester is lowered and the anti-frosting property of the obtained fabric is lowered. The more preferable molecular weight of the G component is 100 to 4000, and further preferably 100 to 1200.

A typical example of the G component having a molecular weight of 90 to 6000 is HO- (CH ₂ -CH ₂ -O) mR.
_{-O- (CH 2 -CH 2 -O)} nH ( wherein R is a divalent aliphatic hydrocarbon group having a straight-chain, cyclic, side chains having 3 to 20 carbon atoms, a phenylene group, biphenylene group, naphthalene A divalent aromatic hydrocarbon group such as a group, m and n are the same or different integers and 1 ≦ m + n ≦ 100), a bisphenol A-ethylene oxide adduct and a polyalkylene glycol represented by the following formula: And so on. A (CnH ₂ nO) mH In the formula, A is CeH ₂ e + 1 O or OH, and e is 1 to 1.
0, n are 2-5, m shows the integer of 2-65.

As the G component, polyalkylene glycol is preferable. This is more advantageous than other G components for obtaining a modified polyester having a degree of polymerization required to obtain fibers having good yarn characteristics, because the polyalkylene glycol has a thickening effect larger than that of other G components. It depends. And as polyalkylene glycol, OH at both ends
More preferred is a polyethylene glycol having a group. This is because the shorter the alkylene oxide unit and the more randomly copolymerized glycol, the greater the effect of improving color development and the effect of reducing viscosity.

The amount of the G component copolymerized is preferably in the range of 0.2 to 10% by weight based on the modified polyester.
When the amount of the G component copolymerized is less than 0.2% by weight, the color development of the modified polyester fiber is insufficient, and when it exceeds 10% by weight, the light resistance and oxidative decomposition resistance of the dyed fabric are deteriorated.

The modified polyester fiber of the present invention preferably has an intrinsic viscosity of 0.64 or more. When the intrinsic viscosity is less than 0.64, the yarn strength becomes too weak. On the contrary, when the intrinsic viscosity is too high, the melt viscosity at the time of melt spinning becomes too high, and the spinning temperature must be increased, which makes composite spinning difficult. The intrinsic viscosity is preferably 0.8 or less.

The modified polyester of the present invention contains well-known additives such as matting agents, antioxidants, optical brighteners, flame retardants, and ultraviolet absorbers within the range that does not impair the effects of the present invention. It may have been done.

Among the different shrinkage mixed yarns, the polyester polymer which constitutes the high shrinkage yarn is preferably a polyester obtained by copolymerizing a third component. This third component includes, for example, oxalic acid,
Examples include dicarboxylic acids such as sebacic acid, phthalic acid and isophthalic acid, glycols such as diethylene glycol, polyethylene glycol and neopentyl glycol, and bisphenol A and bisphenol sulfone. Therefore, isophthalic acid and bisphenol A are particularly preferable. In addition, the copolymerization amount of the third component is preferably 2 mol% or more in order to sufficiently impart the high shrinkage property, and when the copolymerization amount is too large, the woven or knitted fabric is likely to become coarse and hard by the shrinkage difference imparting treatment. It is preferable to keep it to 20 mol% or less.

It is preferable that the high shrinkage yarn has a shape in which concave grooves which are continuous in the yarn longitudinal direction are formed on the surface thereof. The woven and knitted fabric composed of the different shrinkage mixed yarns using the high shrinkage yarns with such a shape has both a texture with a feeling of creaking and the function of water absorption, and it has a softness and creaking feeling and water absorption which are not available in conventional products. A woven or knitted fabric with a certain quality will be obtained. It is preferable to form a plurality of recessed grooves in order to form the recessed grooves clearly. Further, it is preferable that the high shrinkage yarn has a cross-sectional shape in which the hot water-soluble component polymer is arranged in a taper shape from a plurality of positions on the surface toward the inside of the yarn. The high-shrinkage yarn with such a cross-sectional shape has a unique texture feeling and water-absorbing function when at least a part of the hot water-soluble component is dissolved and removed after weaving, and it has a softness not found in conventional products. Thus, it is possible to obtain a woven and knitted fabric having a feeling of creaking and water absorption. FIG. 2 shows an example of the cross-sectional shape of such a high shrinkage composite yarn. A high shrinkage composite yarn having a shape in which hot water-soluble components are arranged in a taper shape from the three convex portions of the trilobal cross section toward the inside of the yarn. That is, the high shrinkage composite yarn of FIG. 2 has three tapered segments 3
And the highly deformed segment 4, and the highly deformed segment is composed of a high shrinkage component polymer.

Further, the high-shrinkage composite yarn has a line segment connecting the average length of the entrance width of the concave groove on the yarn surface and / or the boundary points of the tapered segment and the highly irregular segment on the yarn surface (tapering of the highly irregular segment). When the average length of the inlet groove (corresponding to the inlet width of the groove) is W, and W becomes larger than the average diameter R of the segment to be divided (the average value of the maximum diameter in the case of the irregular shape), a high shrinkage yarn is obtained in the woven or knitted fabric. The segment to be divided easily enters the groove, which tends to reduce the groove effect and the effect of the fineness of the segment. Therefore, W / R is preferably 5 times or less, more preferably 4 times or less, and further preferably 3 times or less in order to sufficiently exert the groove effect and the effect of fineness.

The hot water-soluble component polymer of the high shrinkage composite yarn is preferably the same as the hot water soluble polymer of the splittable composite yarn described above. If they are the same, the productivity is improved and the chemical treatment is not required at the time of the division treatment in the higher-order processing, and the process can be simplified. At the same time, restrictions during the dissolution treatment are significantly reduced, and in particular, division of the woven or knitted fabric and reduction in strength due to the dissolution treatment are suppressed.

The hot water-soluble in the present invention means the property of being substantially dissolved in an ordinary aqueous solution at 98 ° C., and the sparingly soluble in hot water is the property of not being substantially dissolved under the above-mentioned conditions. Means there is.

The hot water-soluble polymer is used as the third component 5
-A copolyester obtained by copolymerizing sodium sulfoisophthalic acid with polyethylene terephthalate can be preferably used, but a copolymer having only 5-sodium sulfoisophthalic acid requires a large amount of copolymerization and is difficult to stretch as described above. May occur. In order to easily draw the hot water-soluble polymer and improve the hot water solubility, it is desirable to copolymerize the fourth component with the third component. Among the fourth components, the spinnability is not reduced,
In addition, isophthalic acid can be preferably used because it can efficiently improve hot water solubility. That is, as the hot water-soluble polymer, copolymerization of 5-sodium sulfoisophthalic acid as a third component with 8 to 14 mol% and isophthalic acid as a fourth component with 10 to 33 mol% is copolymerized with ethylene terephthalate as a main constituent. It is preferably polyester. When the copolymerization amount of 5-sodium sulfoisophthalic acid is less than 8 mol%, the hot water solubility is lowered, and when it is more than 14 mol%, the strength of the composite fiber is apt to be lowered, and it is easily dissolved even in cold water. It may be difficult to handle in the yarn making and higher order processes. Further, if the copolymerization of isophthalic acid is less than 10 mol%, the solubility in hot water is lowered, or insoluble matter tends to remain during the dissolution treatment, and if it is more than 33 mol%, it is difficult to obtain sufficient spinnability, so that the strength of the composite fiber There may be a defect such as a decrease in

The composite ratio (weight ratio) of the hot water-soluble polymer to the low shrinkage polymer and the high shrinkage polymer is 10/90 to 3
0/70 is preferable, and 12/88 is more preferable.
The range is 25/75. This composite ratio is 10/90
When it is smaller, the spinnability is lowered, and when it is larger than 30/70, the strength of the composite fiber is reduced.

In the different shrinkage mixed fiber (multifilament) of the present invention, the splitting type composite yarn is arranged on the outer side of the different shrinkage mixed fiber and the high shrinkage yarn is arranged on the inner side. Is preferable from the viewpoint of exerting the effect of the fineness of the above, and from the viewpoint of reducing dyeing unevenness.
In order to make such an arrangement of the mixed fiber, it is preferable to spin the split type composite yarn and the high shrinkage yarn at the same time as in the spinning method described later. It is more preferable to arrange the discharge holes of the high shrinkage yarns on the outer side and the discharge holes on the inner side for spinning.

Next, a spinneret device 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 explained with reference to FIG.

The mouthpiece device shown in FIG. 3 has 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 trilobe cross-section composite high shrinkage yarn as shown in FIG.

First, the composite spinning portion of the sea-island split type composite yarn will be described. The component polymer A for the segment to be divided is introduced into the opening portion 17 from the introduction hole 13 and the upper plate discharge hole 14.
The numbers of the introduction holes 13 and the upper plate discharge holes 14 correspond to the number of divided segments (islands). The divided component polymer B is soluble in hot water and is introduced from the polymer reservoir 15 through the protrusion 16 into the opening 17, where a sea-island type composite flow is formed and the discharge hole 18 is formed.
More sea-island split type composite yarn is discharged.

Next, the composite spinning portion of the trilobe cross-section composite high shrinkage yarn will be described. The highly deformed segment component polymer C is introduced into the opening portion 24 from the opening portion 19 and the upper plate discharge hole 20.
On the other hand, the component polymer D for the tapered segment is preferably the same hot water-soluble polymer as B, and is preferably the polymer reservoir 21 to the protrusion 2
It is introduced into the open hole 24 through the groove 23 on the upper part 2 and forms a composite flow there, and is discharged from the discharge hole 25 as a three-lobe cross-section composite high shrinkage yarn. Upper plate discharge hole 20, groove 23 and discharge hole 2
The preferred shapes of No. 5 are shown in FIGS. In addition,
The divided segment component polymer A and the divided component polymer B are separated by a partition plate 26, and the highly deformed segment component polymer C and the tapered segment component polymer D are separated by the partition plate 2.
Separated by 7.

The high shrinkage yarn of the present description has been described for the trilobal cross section, but a circular cross section, 4-8 lobe cross section and other shapes can be used in the same manner without any problem. If the tapered segment is unnecessary, D in FIG. 3 may be closed.

Needless to say, the above-mentioned different shrinkage mixed yarns may be obtained by spinning and drawing the split type composite yarn and the high shrinkage yarn from individual spinnerets and then mixing them. Further, spinning and drawing may be performed in separate steps or continuously, and a high-speed spinning method can be sufficiently applied.

The different-shrinkage mixed yarn of the present invention, which is a mixture of low-shrinkage yarn and high-shrinkage yarn having a difference in shrinkage ratio, has a difference in shrinkage ratio and a difference in fineness. This is one of the causes of the deterioration of process passability during weaving and knitting. In order to prevent this, the yarn of the present invention preferably has entanglement, and the number of entanglements is 5 / m to 80.
The number is / m, preferably 5 to 70 / m. The number of confounding is 8
If the number exceeds 0 / m, the woven or knitted fabric using the woven / knitted fabric will have a rough and hard texture, which is not preferable. On the other hand, if the number of entanglements is 5 / m or less, it is not possible to prevent deterioration of the process passability.

The heterogeneous shrinkage mixed yarn of the present invention is woven or knitted or dyed to give a woven or knitted product. The mixed yarn is preferably used as at least one of the warp or weft of the woven or knitted fabric. It is more preferable to use it for all of the warp and weft yarns in order to bring out the full effect. The woven and knitted fabric has 50
% Or more is preferably composed of the mixed fiber, and more preferably is composed of the entire surface. Further, it goes without saying that the mixed fiber can be subjected to yarn processing such as twisting and false twisting within a range that does not prevent the effects of the present invention.

The intrinsic viscosity of each polyester referred to in the present invention is a value obtained by a conventional method in orthochlorophenol at 25 ° C.

[0047]

EXAMPLES The present invention will be specifically described below with reference to examples.

Example 1 As the component polymer A for the segment to be divided, terephthalic acid (98.3 mol%) and dimethyl-5-sodium sulfoisophthalic acid (1.7 mol%) were used as the acid components, and polyethylene glycol having a glycol component molecular weight of 800 was used. 2.5% by weight
Copolymerized polyester (intrinsic viscosity of 0.68 to 0.7
0)) as the splitting component polymer B and the tapered segment component polymer D, 13 mol% of 5-sodium sulfoisophthalic acid and 25 mol% of isophthalic acid.
Copolymerized polyethylene terephthalate (intrinsic viscosity of 0.
62) and polyethylene terephthalate copolymerized with 10 mol% of isophthalic acid (adjusted to have an intrinsic viscosity of 0.67) as the component C for the highly irregular segment.

Using the composite spinnerets shown in FIGS. 3 to 6, a split type composite yarn composed of the component polymer A and the component polymer B and a composite high shrinkage yarn composed of the component polymer C and the component polymer D were simultaneously spun and mixed. A composite spinneret having five composite high-shrinkage yarn discharge holes in the central portion and 36 split-type composite yarn discharge holes in the peripheral portion was used, and spinning was performed at a spinning speed of 1800 m / min. The ratio of component polymer A and component polymer B is 80/20
The sectional shape of the splittable composite yarn is as shown in FIG.
On the other hand, the ratio of component polymer D and component polymer C is 20/80
The cross-sectional shape of the composite high shrinkage yarn is as shown in FIG. The mixed fiber composite undrawn yarn is drawn at 800 m / min and 140 ° C,
50D-36F split-type composite yarn having a boiling water shrinkage of 9%, and 6
A different shrinkage mixed yarn composed of a composite high shrinkage yarn having a boiling water shrinkage rate of 18% of d (30D-5F). The fineness of the divided segment of the splittable composite yarn is 0.13d. In this mixed fiber, the composite high shrinkage yarn component was distributed relatively toward the center.

The above-mentioned different shrinkage mixed yarn is used for warp as well as 200
T / M twist was applied and a plain weave was made by using the warp and weft. The constituent polymer B and constituent polymer D were dissolved and removed from the woven fabric with hot water at 98 ° C., and a difference in shrinkage was developed.
The polyester fabric was dyed and finished as usual by performing a dry heat treatment at ℃ to further develop the shrinkage difference.

The obtained plain woven fabric has good color development, is rich in dry touch, is soft and is excellent in compactness, and has no bulge, waist,
The fabric had good resilience and drapability, was dry, and had a high-class feeling with a peculiar texture and water absorption. The high-shrinkage yarn component was arranged in the central part of the yarn, and the low-shrinkage divided segment was arranged in the outer peripheral part of the mixed fiber yarn constituting the woven fabric, and exhibited a uniform appearance with less dyeing unevenness. The entrance width of the high shrinkage thread groove is 6.2.
.mu.m, the ratio of 1.
It was three times, and almost no penetration of the highly-shrinkable yarn of the divided segment into the groove was observed.

Comparative Example 1 This is a comparative example for clarifying the dyeability and dry touch of the segmented segment polymer A.

Example 1 except that the normal segmented polyethylene terephthalate (intrinsic viscosity 0.66, TiO ₂ 0.5%) not copolymerized with the basic dye dyeable component was used for the segmented segment polymer A. Similarly, weaving, weaving, melt processing,
Shrinkage development and dyeing and finishing with disperse dyes were performed. The obtained product lacked in color development and had insufficient dry touch.

Comparative Example 2 This is a comparative example for clarifying the solubility of the divided component polymer B and the tapered segment polymer D.

Polymers in which 5 mol% of 5-sodium sulfoisophthalic acid was copolymerized were used for the divided component polymer B and the tapered segment polymer D, and other operations were carried out in the same manner as in Example 1. As a matter of course, the polymer was indivisible by hot water at 100 ° C., and no tapered groove was formed. Since splitting and elution cannot be performed with hot water, an alkaline treatment was carried out with an aqueous solution at 100 ° C. under a normal alkaline weight reduction treatment condition having a NaOH concentration of 30 g / l until the components B and D could be removed. The B component polymer and the D component polymer could be dissolved, but the A component, which became an ultrafine filament, was also affected by the alkali treatment, and the fabric became brittle and the strength was significantly reduced, which made it unsuitable for practical use.

Example 4 The split type composite yarn and the composite high shrinkage yarn in Example 1 were separately spun using a spinneret and stretched, while the drawn yarns were combined to form 2
A twist of 00 T / M was applied to give a different shrinkage mixed yarn. Then, 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 segment to be divided in the mixed yarn constituting the woven fabric are grouped respectively, and the softness and the denseness are slightly small, and dyeing irritability occurs and the appearance The quality was also slightly inferior.

[0058]

The different shrinkage mixed yarn of the present invention is a mixed yarn of the split type composite yarn in which the low shrinkage yarn is composed of the basic dye-dyeable polymer and the high shrinkage yarn of large fineness. The segment to be divided of the composite yarn has an ultrafine fineness and a large number of segments, and when it is made into a woven or knitted product, it has a rich coloring property and is extremely soft with a dry touch. A woven or knitted fabric having a high-grade feeling, which has waist, resilience, drapeability, and the like, can be obtained.

Further, the blended yarn is made softer and smoother by improving the polymer arrangement, that is, by arranging, for example, the easily soluble component polymer in a taper shape from the surface of the highly shrinkable yarn toward the inside of the yarn. It can be equipped with a unique texture. Furthermore, if the cross-sectional shape of the highly shrinkable yarn is highly modified,
It can also give a tingling sensation and water absorption. Furthermore, since a hot water-soluble polymer is used as the easily soluble component polymer, restrictions during the dissolution treatment are significantly reduced, and in particular, the strength reduction due to the dissolution treatment of the woven or knitted fabric or the raw yarn thereof can be greatly suppressed. Further, since the composite fiber is dissolved and removed by hot water treatment and does not require a special chemical treatment, it can be sufficiently mixed with many other types of fibers, especially natural fibers that are repelled by the change due to chemical treatment. It has a remarkable effect in the field of woven and knitted fabrics.

[Brief description of drawings]

FIG. 1 is a view showing an example of a sectional shape of a splittable composite yarn according to the present invention.

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

FIG. 3 is a schematic view showing an example of a mouthpiece device for manufacturing a different shrinkage mixed yarn according to the present invention.

FIG. 4 is a diagram showing the shape of the upper plate discharge holes of the high shrinkage composite yarn portion of the mouthpiece device of FIG.

5 is a view showing a groove shape for inflowing a D component, which is provided in an upper portion of a lower plate of a high shrinkage composite yarn portion in the mouthpiece device of FIG.

FIG. 6 is a view showing a shape of a discharge hole of a composite yarn provided in a lower part of a lower plate of a high shrinkage composite yarn portion of the mouthpiece device of FIG.

[Explanation of symbols]

 1: Segment to be divided 2: Divided component 3: Tapered segment 4: Highly irregular segment 11: Upper plate 12: Lower plate 13: Introduction hole 14: Upper plate discharge hole 15: Polymer reservoir 16: Projection 17: Opening part 18: Lower plate discharge hole 19: Open hole part 20: Upper plate discharge hole 21: Polymer reservoir 22: Protrusion part 23: Groove 24: Open hole part 25: Lower plate discharge hole 26: Partition plate 27: Partition part A: Cover Divided segment component polymer B: Divided component polymer C: Highly irregular segment component polymer D: Tapered segment component polymer

Claims (6)

[Claims] 1. A heterogeneous shrinkage mixed yarn composed of a low-shrinkage yarn and a high-shrinkage yarn, which is a splittable composite yarn, wherein a segment to be split of the splittable composite yarn comprises a basic dye-dyeable polymer, and The fineness is 0.05 to 0.5d, at least the split component is a hot water-soluble component, and the single yarn fineness of the highly shrinkable yarn is 4 to
10d, the number of filaments of the splittable composite yarn is 4 times or more the number of filaments of the high shrinkage yarn, and the number of divided segments is 20 times or more of the number of filaments of the high shrinkage yarn. Different shrinkage mixed yarn. 2. The heterogeneous-shrink mixed yarn according to claim 1, wherein the yarn constituting the different-shrink mixed-filament yarn is polyester. 3. The splittable composite yarn, which is a low shrinkage yarn, has a basic dye-dyeable polyester as the segment to be split, and the basic dye-dyeable polyester contains all isophthalic acid components containing a metal sulfonate group. 3. A copolymer of 0.7 to 2.4 mol% with respect to the dicarboxylic acid component and 0.2 to 10 wt% of a polyalkylene glycol component having a molecular weight of 90 to 6000 with respect to the polyester. Different shrinkage mixed yarn. 4. The heterogeneous shrinkage mixed fiber according to any one of claims 1 to 3, wherein the high shrinkage yarn has a cross-sectional shape in which hot water-soluble components are arranged in a taper shape from a plurality of positions on the surface toward the inside of the yarn. yarn. 5. The hot water-soluble component comprises 8 to 14 mol% of 5-sodium sulfoisophthalic acid and 10 to 10 of isophthalic acid.
The heterogeneous shrinkage mixed yarn according to any one of claims 1 to 4, which is composed of a modified polyester copolymerized with 33 mol% and having an intrinsic viscosity of 0.56 to 0.70. 6. The heterogeneous-shrinkage mixed yarn according to claim 1, wherein the heterogeneous-shrinking mixed yarn has an entanglement of 5 to 80 pieces / m.