JPH05148706A - Blended yarn having multiple different shrinkage and different fineness - Google Patents

Abstract

PURPOSE:To obtain the subject blended yarn consisting of single fiber groups different in conjugate ratio of plural fiber forming polymers having different shrinkage factors and good mature, capable of providing stretchable cloth having softness, swelling feeling and stretching stiffness and rich in high-class feeling as use for cloth of middle thickness. CONSTITUTION:The objective blended yarn having multiple different shrinkage and different fineness is obtained by passing a polymer A in two or more kinds of fiber forming polymers A and B having different shrinkage factors through a disperse penetrating holes 4 and 5 and passing the polymer B from a passage hole 7 through a disperse hole 8 and joining the both polymers using a spacer 6, discharging the joined polymer from discharge holes 10-13 of a spinning nozzle 9 while controlling conjugate ratio to produce three or more kinds of single fiber groups in which maximum single yarn fineness is 1.2-8 times minimum single yarn fineness and blending these single fiber groups. The blended yarn satisfies formula I (F is single fiber number constituting blended yarn) and formula II in shrinkage factor to boiling water SN when integral number N is given in smaller order of shrinkage factor of single fiber and satisfies formula III (when F is odd number, formula IV) in shrinkage factor to boiling water SM when integral number M is given in smaller order of single fiber fineness.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-dimensional, different-shrinkage, different-fineness mixed yarn suitable for producing various kinds of high-grade clothing fabrics.

[0002]

2. Description of the Related Art Conventionally, a plurality of single yarns having different characteristics such as a fineness of a single yarn constituting a multifilament, a shrinkage ratio thereof, a solubility in an alkaline hot aqueous solution or a dye dyeing property are mixed and woven. By knitting, a number of methods for producing a cloth for clothing having a peculiar preferable feeling such as swelling feeling, drapeability, soft surface touch, waist, tension or heathering have been proposed.

In the prior art, a plurality of polymers having different characteristics are discharged from the same spinner using a composite spinning machine and mixed in a spinning process, and a plurality of polymers having different characteristics are prepared in advance. Multiple post-filaments with different properties can be produced by spinning the polymers separately or by varying the spinning process and / or drawing conditions, etc. Be separated.

As the former spinning mixed fiber method, for example, Japanese Patent Application Laid-Open No. 63-42913 discloses a technique for producing a mixed fiber by spinning a high shrinkage yarn and a low shrinkage yarn from the same spinneret. In addition, Japanese Patent Application Laid-Open No. 57-139515 discloses a technique for producing a mixed fiber of different fineness by varying the discharge amount per discharge hole.
These spun mixed fiber methods have high productivity and can be mixed with each other uniformly to obtain a so-called "combination" good mixed fiber. However, in this method, even if an attempt is made to obtain three or more kinds of mixed yarns, the polymers that can be used are limited in terms of spinnability and equipment, and in recent years, it is possible to meet various demands for expression of various feelings. It was not possible to produce a fabric with a higher quality.

On the other hand, the latter post-mixing method is disclosed in, for example, JP-A-62-170517 and JP-A-63.
JP-A-126929 discloses a method in which a plurality of multifilaments are given a shrinkage ratio difference and then combined to form a mixed fiber. In these post-mixing method, it is sufficient to produce many kinds of multi-filaments having various characteristics and to mix them, and thus the expression power to be exhibited is remarkably high, but this method has low productivity, In addition, the "softness" was poor, and the characteristics of the mixed fiber could not be fully exhibited.

In Japanese Patent Publication No. 2-32366,
A method for producing a mixed fiber having various expressive powers is disclosed by forming two kinds of fiber-forming polymers in a multifilament cross section in a random composite state in a plurality of layers. However, since it is difficult to control the composite ratio and composite form of each single yarn by this method, it is very difficult to control the change in shrinkage rate and the change in fineness of the single yarn. ..

To solve the above problem, we have proposed Japanese Patent Laid-Open No. 2-259.
In Japanese Patent Publication No. 135, there is disclosed a mixed fiber having a good "komare" and various expressive powers, and a method for producing the same. However, the method of this publication certainly has various expressive powers, but by compatibilizing the polymer in the single yarn, the combined effect of the polymer is not exhibited, and the crimp expression is insufficient. Therefore, it was found that the characteristics of the composite mixed yarn cannot be fully exhibited. Depending on the application, tension,
It was also revealed that the waist was not always sufficient.

Further, in Japanese Patent Laid-Open No. 3-220331, a mixed fiber having good "softness", softness, tension, and elasticity by continuously changing the shrinkage rate of the single yarn in the mixed fiber is disclosed. I proposed, but depending on the application, tension,
It was revealed that the waist and softness are not always sufficient.

[0009]

SUMMARY OF THE INVENTION An object of the present invention is to provide a mixed fiber having a good "konare" which is a characteristic of the spinning mixed fiber system, and has a variety of expressive powers in the post-fiber mixing system. It is to provide a mixed yarn having multiple different shrinkage and different fineness that does not exist.

[0010]

The object of the present invention is to consist of a composite of at least two kinds of fiber-forming polymers having different shrinkage ratios, and three or more kinds of single yarn groups having different composite ratios. Of the single yarn group, wherein at least one kind of the single yarn group is a composite yarn composed of a composite of the at least two kinds of fiber-forming polymers, and the fineness of the single yarn group having the largest single yarn fineness is the largest single yarn fineness. A multiple-shrinkage-shrinkage-difference mixed-filament yarn which is 1.2 times or more and less than 8 times the single thread fineness of a small single yarn group and which satisfies the following physical properties. (1) When an integer number N (N ≧ 1) is given in order from the one having the smallest boiling water shrinkage ratio of the single yarns that compose the multiple different shrinkage and different fineness mixed yarns, the single yarn of the number N and the boiling water of the single yarns are given. The relationship with the contraction rate S _N is (30 × N / F) −15 ≦ S _N ≦ (30 × N / F) +10 (a) 0 ≦ S _{N + 1} −S _N ≦ 5 (b). However, F is the number of single yarns that compose the multiple different shrinkage different fineness mixed yarn, and 0 ≦ S _N. (2) When an integer number M (M ≧ 1) is given in order from the single yarn having the smallest single yarn fineness of the multiple yarns having the multiple different shrinkage and different fineness, the single yarn of the number M and boiling water of the single yarn are given. The relationship with the contraction rate S _M is

[0011]

[Equation 3]

However, when F is an odd number, the central value is treated as corresponding to both the left and right sides. −5 ≦ S _{M + 1} −S _M ≦ 5 (d). Can be achieved by

The multiple different shrinkage different fineness mixed yarn of the present invention (hereinafter,
The mixed fiber) is composed of a composite of at least two types of fiber-forming polymers (hereinafter referred to as polymers) having different shrinkage rates, and is composed of three or more types of single yarn groups having different composite ratios. Need to be The term "composite" as used in the present invention means that two or more kinds of polymers are laminated in a plurality of layers in a single yarn. When two or more kinds of polymers are laminated on many layers, the expression of fine crimps due to the composite is reduced, so that 10 or less layers are preferable in order to obtain a desired crimp extension ratio.
The more preferable number of laminated layers of two or more polymers is 2 or more and 4 or less. The composite form at that time may be a composite form such as a bimetal type composite fiber, but preferably the boundary surface of two or more kinds of polymers is not formed by a straight line or one concave portion or a convex portion. It is preferable to have a composite form having a boundary surface formed by the above-mentioned uneven portions.

As a concrete combination of two kinds of polymers,
For example, a modified polyester obtained by copolymerizing an unmodified polyester with a third component such as an aromatic or aliphatic dicarboxylic acid or a diol, or a combination of a modified polyester mixed with particles or pigments A combination of a polyamide and a modified polyamide such as a combination of a modified polyamide obtained by copolymerizing an unmodified polyamide and a third component, or a modified polyamide mixed with particles or pigments, a combination of an unmodified polyester and an unmodified polyamide A combination of at least two polymers having different shrinkage properties such as a combination of modified polyester and modified polyamide is preferable.

When the number of single yarn groups having different composite ratios is one or two, it is not possible to obtain a mixed yarn having a good "warp", and at the same time, the boiling water shrinkage ratio and the crimp elongation ratio of the single yarns are changed. Therefore, since it is impossible to impart a natural bulge or stretchability when it is made into a fabric, it is not possible to impart various expressive power to the mixed fiber.

In order to improve these, the mixed yarn of the present invention is required to have three or more types of single yarn groups having different composite ratios. In order to make the effect of the present invention more conspicuous, it is preferable to make the composite ratio of the polymer composites constituting four or more types, preferably 5 or more types of single yarn groups different. More preferably, all the single yarn groups constituting the mixed fiber are made of polymer composites having different composite ratios, and the fiber characteristics thereof are different.

The term "single yarn group having a different composite ratio" as used in the present invention refers to a yarn which constitutes a mixed fiber and has at least one single yarn having the same composite ratio of the polymer composite. Say. The composite ratio of the polymer composite as used herein refers to a composite ratio of a polymer of a certain kind and a polymer of another kind in the cross-sectional area of the single yarn constituting the mixed yarn of the present invention. For example, when the two types of polymers are A and B, assuming that the cross-sectional area ratio a of the polymer A and the cross-sectional area ratio b of the polymer B in the cross-sectional area of the single yarn, the polymer A and the polymer B are The composite ratio of a: b (a
+ B = 100). In the mixed yarn of the present invention, a group of single yarns having a composite ratio a: b of the polymer A and the polymer B of 100: 0 or 0: 100 is included within a range not impairing the effect of the present invention. However, the content in the mixed yarn of the single yarn group having the composite ratio a: b of 100: 0 or 0: 100 is 20.
It is preferably less than%.

The difference in the composite ratio a: b means that the shrinkage characteristics are substantially different, and there is a difference of 5 or more between a and b. That is, when the difference in a or b is less than 5, the shrinkage characteristics are not substantially different, but when the difference in a or b is 5 or more, the shrinkage characteristics are substantially different. Become. As a method of sorting the group of single yarns, when the single yarns are arranged in the ascending order of the composite ratio, for example, in the ascending order of the composite ratio a of the polymer A, the a is based on the single yarn having the smallest composite ratio a of the polymer A. In the range where the difference between the two is less than 5, it is considered as one group, and the next group is prepared by the same method based on the single yarn having the smallest composite ratio a of the polymer A among the single yarns of the above group. Regarded as a group of. Further, when three or more kinds of polymers are compounded, a single yarn group may be sorted by the above method for one kind of the polymers.

Further, among the single yarns constituting the mixed yarn of the present invention, the single yarn fineness of the single yarn group having the largest single yarn fineness is 1.2 times the single yarn fineness of the single yarn group having the smallest single yarn fineness. It is necessary to be 8 times or more and less than 8 times. If the ratio of the single yarn fineness is less than 1.2 times, it is not possible to obtain a high-quality apparel material having a unique texture, that is, a textured surface with excellent elasticity, and conversely, the ratio of the single yarn fineness is When it is 8 times or more, flexibility of surface touch is impaired, which is not preferable. The preferred single yarn fineness ratio is 1.5
It is more than twice and less than six times. The term "single yarn group having different single yarn fineness" as used in the present invention means a mixed yarn, and at least one single yarn having the same single yarn fineness in the polymer composite is used. ..

Next, a single yarn constituting the mixed yarn of the present invention,
An integer number N (N ≧
When 1) is given, N and the boiling water shrinkage ratio S _{N of the} single yarn must satisfy the following expressions (a) and (b). (30 × N / F) −15 ≦ S _N ≦ (30 × N / F) +10 (a) S _{N + 1} −S _N ≦ 5 (b) where F is the number of single yarns constituting the mixed fiber, Let 0 ≦ S _N.

That is, all the single yarns in an arbitrary section in the length direction of the mixed fiber are separated, and the boiling water shrinkage rate is measured by the method described later. An integer number N (N ≧ 1) is given. At this time, single yarns having the same boiling water shrinkage ratio are not given the same number, but a small number is given from any single yarn among them.

Here, the number of single yarns constituting the mixed yarn is F
, The boiling water shrinkage ratios S _N and N of the single yarn whose number is N
It is necessary that the above equation (a) is satisfied between / F. Boiling water shrinkage S _N in any single yarn N is (30 × N
/ F) -15 is less than -15, the shrinkage ratio of each single yarn is small, and when the fabric is made, a sufficient bulging feeling cannot be obtained, and conversely, S _N is (30 × N / F). ) In the case of a mixed fiber yarn composed of more than +10 single yarns, the shrinkage ratio of each single yarn is high, so that the feeling of coarseness and hardness is increased and only a poor quality drape is obtained. Preferably S _N is (30 × N / F) −1
It is 0 or more and (30 × N / F) +8 or less.

Further, it is necessary that the above equation (b) is established between the single yarn number N and the single yarn (N + 1) having the second highest boiling water shrinkage rate. That is, when the difference S _{N + 1} −S _{N in} boiling water shrinkage between the single yarn N and the single yarn (N + 1) having the second highest boiling water shrinkage in the mixed yarn exceeds 5%, the mixed yarn is hard. The core remains, and a soft-textured fabric cannot be obtained. Preferably, S _{N + 1} −S _N is 0% or more and 3% or less.

Further, in order to exert the bulging effect more effectively, the boiling water shrinkage rate (S _{N MAX} ) of the single yarn having the maximum boiling water shrinkage rate in the mixed fiber and the minimum boiling water shrinkage rate of the single yarn are obtained. The difference in boiling water shrinkage (S _{N MIN} ) of the yarn is preferably 10% or more, more preferably 13% or more, and further preferably 15% or more.

Next, when an integer number M (M ≧ 1) is given in order from the single yarn having a smaller single yarn fineness constituting the mixed yarn of the present invention, M and the boiling water shrinkage S of the single yarn are given. _M is the following formula (c)
Must be met.

[0026]

[Equation 4]

[0027] However, when F is an odd number,
That is, the value of (F + 1) / 2 is treated as corresponding to both the left side and the right side.

That is, all the single yarns in an arbitrary section in the length direction of the mixed yarn are divided, and the single yarn fineness and the boiling water shrinkage ratio are measured. An integer number M (M ≧ 1) is given. At this time, single yarns having the same single yarn fineness are not given the same numbers, but the single yarns having a smaller boiling water shrinkage ratio are given smaller numbers.

Here, when F is the even number, where F is the number of filaments constituting the mixed fiber, the boiling water shrinkage ratio S _M of the single yarn whose number M is 1 to F / 2 It is necessary that the above equation (c) is satisfied between the average and the average of the boiling water shrinkage rates S _M of the single yarns whose numbers M are (F / 2) +1 to F. When F is an odd number, the center, that is, the value of (F + 1) / 2 is added to both the left side and the right side, and the number M
There wherein between the average from 1 (F + 1) / the single yarns until 2 boiling water shrinkage S _M, the average of boiling water shrinkage percentage S _M of the single yarn from a number M (F + 1) / 2 until F ( It is necessary that the equation c) holds. If the relationship of the above formula (c) is not established, the soft feeling of tension, waist and surface cannot be effectively exhibited. In order to exhibit preferable tension and soft texture of the waist and the surface, when the number of single yarns constituting the mixed fiber is F, when F is an even number, the number M is 1
The difference between the average boiling water shrinkage S _M of the single yarns from F to F / 2 and the average boiling water shrinkage S _M of the single yarns with number M from F / 2 + 1 to F is 8% or more, more preferably 10%. % Or more.

Further, in order to impart tension and elasticity and at the same time effectively exhibit the soft texture of the surface, it is necessary to satisfy the following expression (d). −5 ≦ S _{M + 1} −S _M ≦ 5 (d) Single yarn having the second largest single yarn fineness (M +)
If the difference S _{M + 1} −S _{M in} the boiling water shrinkage ratio from 1) does not satisfy the above expression (d), the mixed fiber has a hard core and a soft texture cannot be obtained. Preferably, S _{M + 1} −S
_M is -3% or more and 3% or less.

That is, in order to exhibit excellent tension and soft texture of the waist and the surface, the individual filaments having a small single yarn fineness have a relatively low shrinkage and the outside after heat treatment, the filaments having a large single yarn fineness. Preferably has a relatively high shrinkage and occupies the inside after heat treatment.

The crimp elongation K of the mixed yarn of the present invention is 1
It is preferably 0% or more. Crimp elongation rate K is 10%
If it is less than the above range, it is difficult to impart a sufficient swelling feeling to the mixed fiber, and a soft texture cannot be expressed. The crimp extension ratio for expressing a soft texture is preferably 15% or more, more preferably 20% or more.

Further, the crimp elongation rate K _N of the single yarn constituting the mixed yarn of the present invention preferably satisfies the following expression (e).

[0034]

[Equation 5]

However, when F is an odd number, F / 2 is set to (F +
Treat as 1) / 2.

That is, among the single yarns constituting the mixed yarn by the above-mentioned method, an integer number N (N ≧ 1) is given to each single yarn in the ascending order of the boiling water shrinkage of the single yarn, and the method described further below. When the crimp elongation ratio of the single yarn is measured with, it is preferable that the relationship of the formula (d) is established. That is, by imparting a crimp elongation rate of more than 5% to a high shrinkage single yarn of a mixed fiber, it is possible to express an appropriate tension and a soft texture without a core when a fabric is formed, and Stretchability can be imparted to the fabric manufactured using the mixed yarn. The crimp elongation of the high shrinkage single yarn is preferably 10% or more, more preferably 15% or more.

Next, a manufacturing method for obtaining the mixed fiber of the present invention will be described with reference to the drawings. The mixed fiber of the present invention can be produced by, for example, a method of producing a plurality of polymers having different shrinkage rates when they are produced under the same production conditions by giving a composite ratio distribution immediately before the spinneret.

FIG. 1 is a sectional view of a main part showing an example of a spinning pack that can be used in the present invention. In FIG. 1, two kinds of polymers A and B to be composited are made into two flows by a usual composite spinning pack to reach the upper part of the spinneret supported by the pack body 1. Of the polymers A and B, the polymer A is passed through the polymer dispersion through holes 4 and 5 formed in the upper dispersion plate 2 and the lower dispersion plate 3, and is guided to the upper spacer 6 of the die. On the other hand, the polymer B is
The polymer is passed through a polymer passage hole 7 formed in the outermost periphery of the upper dispersion plate 2, and then is introduced into the upper die spacer 6 through a polymer dispersion hole 8 formed in the lower dispersion plate 3.

In order to control the composite ratio and the composite morphology of the single yarn, the following positions of the dispersion through holes of the lower dispersion plate and the positions of the dispersion holes and the discharge holes are controlled so that the flow of the polymer in the upper spacer of the spinneret can be controlled. Need to decide. FIG. 2 is a plan view of the spinneret plate 9 as viewed from above. For example, as shown in FIG. 2, the discharge holes 10, 11,
Circular areas 14, 15, 16 and 17 corresponding to the ejection amount ratio per ejection hole are assumed around the perforation positions 12 and 13, and the ejection hole positions are determined so that the circular areas do not overlap. .. Next, in the region of the circle, a number of dispersion through holes and dispersion holes of the lower dispersion plate corresponding to the discharge amount ratio per discharge hole are formed in the lower dispersion plate. At this time, the dispersion through holes and the dispersion holes of the lower dispersion plate are randomly punched in the regions 14, 15, 16 and 17 of the respective circles corresponding to the discharge amount ratio per discharge hole. The morphology cannot be a composite morphology with a preferable number of layers, and particularly in the case of a single yarn having a large fineness, the number of layers becomes too large and the expression of fine crimps becomes small, which is not preferable. Therefore, in order to obtain a preferable composite form, the dispersion through-holes and the dispersion holes of the lower dispersion plate are the regions 14 of each circle corresponding to the discharge amount ratio per discharge hole,
It is preferable to perforate the dispersion through holes and the dispersion holes in 15, 16 and 17 so as to be divided into blocks of 1 or more and 5 or less.

As described above, the flow of the polymer in the upper spacer of the spinneret can be controlled by forming the discharge holes and the dispersion through holes and the dispersion holes of the lower dispersion plate in correspondence with each other, and the single yarn The composite ratio and composite morphology can be controlled. In this way, the polymers A and B, which are separately introduced into the composite spinning pack, merge in the upper space of the spinneret. The merged polymer is in a state in which the polymer A and the polymer B are compounded in a block shape, and the discharge holes 10, 11 formed by the above method in the spinneret plate 9 without disturbing the flow of the compound, From the groups 12 and 13, the maximum value of the discharge amount per discharge hole is 1.
It is ejected at a rate of 2 to 8 times.

The polymer discharged in this way is composed of a composite of at least two kinds of polymers, and is composed of three or more kinds of single yarn groups having different composite ratios, and a single yarn group having the largest single yarn fineness. As a yarn having a single yarn fineness of 1.2 times or more and less than 8 times the single yarn fineness of the single yarn group having the smallest single yarn fineness, ordinary spinning operations such as cooling and oiling are performed and wound. Since the effect of the present invention is not impaired by the winding operation, the winding operation can be applied to any process such as a method of once winding as an undrawn yarn and then stretching, or a high-speed spinning method. If necessary, false twisting or yarn processing such as air entanglement may be performed. Here, an example of two kinds of polymers is shown, but a composite of three or more kinds of polymers is also possible by adding a die plate having a group of dispersed through holes.

[0042]

EXAMPLES The present invention will be described in more detail below with reference to examples. The methods for measuring the characteristics and the like used in the examples are as follows. (A) Intrinsic viscosity [η] It is a value measured by an Ostwald viscometer in an orthochlorophenol solution at 25 ° C. (B) Composite ratio A sample cut to a thickness of 5 microns was used as a disperse dye (0.2 wt.
%) At 98 ° C. for 30 minutes, and the composite ratio was determined from the dyed cross section.

(C) Boiling water shrinkage rate of single yarn After sampling 10 cm or more of an arbitrary place of the mixed yarn, it is divided into single yarn.

A load of 0.1 g / d is applied to the single yarn, and a mark is made at a position where the single yarn length is just 10 cm. Immerse it in 98 ° C. water for 15 minutes in a free state, fixing both ends and applying as little external force as possible. At this time, the treatment is performed by slackening it from the beginning so that tension is not applied even if it contracts during the treatment. After air-drying, the treated single yarn length S (cm) is 0.1
It is measured by applying a load of g / d. Here, the boiling water shrinkage rate of the single yarn is calculated by the following formula. Shrinkage rate of boiling water (%) = {(10-S) / 10} × 100 (d) Crimping elongation rate of mixed fiber yarn The mixed fiber yarn is taken out, and it is put in water at 98 ° C for 15 minutes in a free state. After soaking and air drying, dry heat treatment is performed for 5 minutes in an oven at 200 ° C. under a load of 0.2 mg / d. 0.2 m
The mixed fiber length L ₀ after the dry heat treatment is measured under a load of g / d, and then the mixed fiber length L is measured by applying a load of 0.2 g / d. Here, the crimp elongation rate of the mixed fiber is calculated by the following formula. Crimping elongation rate (%) = {(L−L ₀ ) / L} × 100 (e) Crimping elongation rate of single yarn After sampling 10 cm or more of an arbitrary place of the mixed yarn, it is divided into single yarns. The separated single yarn is immersed in 98 ° C. water for 15 minutes in a free state, air-dried, and then dry-heat treated for 5 minutes in an oven at 200 ° C. in a free state. Measure the mixed fiber length L ₁ after dry heat treatment in a free state and then measure 0.2 g /
The load of d is applied and the mixed filament long yarn L is measured. Here, the crimp elongation rate of the single yarn filament is calculated by the following formula. Crimp elongation rate (%) = {(L−L ₁ ) / L} × 100 (f) Evaluation of hand feeling “swelling feeling”, “soft feeling”, and “soft feeling”, which are the basic feelings that are important as a cloth for high-quality clothing. Sensory evaluation was carried out by 10 skilled engineers for three types of "tension waist", and each was evaluated on the basis of 10 points with the conventional use of the shrinkage difference mixed fiber as a standard (5 points). The obtained scores are averaged, and 0 or more and less than 2 is XX, 2 or more and less than 4 is X, 4 or more and less than 6 is Δ, 6 or more and less than 8 is ◯, 8 or more and 10 is The following is marked with ⊚, and displayed in 5 stages. ◎… It is extremely excellent.

○: Excellent.

Δ: Normal.

X: Inferior

XX ... very inferior.

Example 1 Polyethylene terephthalate having an intrinsic viscosity [η] of 0.66 was used as the polymer A, 12.9 mol% of isophthalic acid was used as the polymer B, and 2,2 bis {4- (2-hydroxyethoxy) was used. A modified polyester having an intrinsic viscosity [η] of 0.67 copolymerized with 2.0 mol% of phenyl} propane was used, and the supply ratio of the polymer A and the polymer B was 50:50, and the spinning shown in FIG. In the pack, a die plate having four kinds of discharge holes having different discharge hole diameters produced by the above-described method, and a number of dispersion through holes and dispersion holes corresponding to the discharge amount ratio corresponding to the discharge holes are 1 to 1 in each discharge hole. A conventional composite spinning machine controls the flow of the polymer composite flow in the upper space of the spinneret using upper and lower dispersion plates perforated so as to be divided into 5 blocks, and the spinning temperature is 29
It was spun at 0 ° C. and wound up at a speed of 1250 m / min. Then, it is stretched and the composite ratio a: b of the polymer A and the polymer B is 95: 5, 70:30, 50:50, 30: 7, respectively.
It is a multi-filament mixed yarn of 75 denier and 37 filaments composed of 5 kinds of single yarn groups of 0, 5:95, and the single yarn fineness is 1.0 denier (21 filaments) and 2.5 denier (8 filaments). ) 3.6 denier (5 filaments) and 5.3 denier (3 filaments).

The characteristics of this mixed fiber are shown in Table 1. The values related to the equation (a) are shown in FIG. FIG. 3 is a graph in which the values of the equation (a) and the first embodiment are plotted. The mixed yarn was sweet twisted, used as a warp yarn and a weft yarn, woven, relax-scoured at 98 ° C., and finish-set at 170 ° C. to form a habutae. Table 1 shows the evaluation results of the texture of the obtained cloth. The obtained fabric had a soft feeling without a core while having a feeling of swelling and firmness, and had a stretchability of 15%.

Example 2 Polyethylene terephthalate having an intrinsic viscosity [η] of 0.66 was used as the polymer A, and 4.8 mol% of 5-sodium sulfoisophthalic acid was copolymerized as the polymer B. The intrinsic viscosity [η] 0 Example 1 using modified polyester of 0.60
By the same operation as described above, spinning was performed with the ratio of the supply amount of the polymer A and the polymer B being 50:50, and the composite ratio a: b of the polymer A and the polymer B was 95: 5, 70:30, 50: 5
It is composed of 5 types of single yarn groups of 0, 30:70 and 5:95, and the single yarn fineness is 1.0 denier (21 filaments), 2.5 denier (8 filaments), 3.6 denier (5 filaments). A multifilament mixed yarn of 75 denier and 37 filaments composed of four kinds of 5.3 denier (3 filaments) was obtained.

Table 1 shows the characteristics of the mixed fiber. The values related to the equation (a) are shown in FIG. FIG. 4 is a graph obtained by plotting the equation (a) and the values of the second embodiment. The mixed yarn was sweet twisted, used as a warp yarn and a weft yarn, woven, relax-scoured at 98 ° C., and finish-set at 170 ° C. to form a habutae. This fabric was subjected to weight reduction treatment using an alkali hot aqueous solution having a caustic soda (NaOH) concentration of 30 g / liter at 98 ° C. until the weight reduction rate reached 25%. Table 1 shows the evaluation results of the texture of the obtained cloth.
Shown in. The obtained fabric had a soft feeling without a core while having a feeling of swelling and firmness, and also had a very soft surface touch, and had a stretchability of 17%.

Comparative Example 1 In Example 1, the dispersion through holes were densely formed at the center of the die and sparsely distributed toward the outer periphery in order to have a composite ratio gradient on the concentric circle from the center of the die to the outer periphery as the dispersion plate. , The dispersion holes are sparsely distributed at the center of the spinneret, and the dispersion holes are perforated so that the holes become denser toward the outer periphery.In each group in which the discharge hole diameter is concentrically arranged as the spinneret plate, Use different spinneret plates, and use 15 as a kneading material in the upper spacer of the spinneret.
Spinning and stretching were performed under the same conditions as in Example 1 using a spinning pack in which three μm filters were laminated, and the composite ratio a: b of the polymer A and the polymer B and the single yarn fineness were 95 respectively. : 5 with 4.0 denier (3 filaments), 7
3.0 denier at 8:30 (8 filaments), 30:
70 denier (10 filaments), 5:95
It is a multi-filament mixed yarn of 75 denier and 37 filaments composed of four types of single yarn group of 1.2 denier and (16 filaments), and the cross section of each single yarn of the mixed yarn was complex. The polymer did not form a plurality of layers, but was in a state of being finely mixed.

This mixed fiber has the characteristics as shown in Table 1, and the crimping characteristics are deteriorated due to the effect of the kneading material in the upper spacer portion of the die, which is not preferable. The values related to the equation (a) are shown in FIG. FIG. 5 is a graph in which the equation (a) and the values of Example 3 are plotted. The mixed yarn was sweet twisted, used as a warp yarn and a weft yarn, woven, relax-scoured at 98 ° C., and finish-set at 170 ° C. to form a habutae. Table 1 shows the evaluation results of the texture of the obtained cloth.
Shown in. The obtained fabric had a feeling of swelling and firmness, but had a feeling of leaving a core, and had a low stretchability of 6%.

Comparative Example 2 The same spinning operation as in Example 1 was carried out except that a spinneret plate having two kinds of discharge holes having different discharge hole diameters so that the ratio of single yarn fineness was 1.15 times was used. , Polymer A and Polymer B
Composite ratios a: b are 95: 5, 70:30, 5 respectively.
It was composed of 5 kinds of single yarn groups of 0:50, 30:70 and 5:95, and the single yarn fineness was composed of 2 kinds of 1.9 denier (19 filaments) and 2.2 denier (18 filaments). A multifilament mixed yarn of 75 denier and 37 filaments was obtained. The characteristics of this mixed fiber are shown in Table 1. The values related to the equation (a) are shown in FIG.
It was shown to. FIG. 6 is a graph in which the values of the expression (a) and Comparative Example 1 are plotted. The mixed yarn was sweet twisted, used as a warp yarn and a weft yarn, woven, relax-scoured at 98 ° C., and finish-set at 170 ° C. to form a habutae. Table 1 shows the evaluation results of the texture of the obtained cloth. The obtained fabric had a swelling feeling and a soft texture without a core, but lacked firmness.

Comparative Example 3 The same spinning operation as in Example 1 was carried out except that a spinneret plate having two kinds of discharge holes having different discharge hole diameters so that the ratio of single yarn fineness was 8.5 times was used. , The composite ratio a: b of the polymer A and the polymer B is 95: 5, 70:30, 5 respectively.
It was composed of 5 kinds of single yarn groups of 0:50, 30:70 and 5:95, and the single yarn fineness was composed of 2 kinds of 1.0 denier (32 filaments) and 8.5 denier (5 filaments). A multifilament mixed yarn of 75 denier and 36 filaments was obtained. The characteristics of this mixed fiber are shown in Table 1. The values related to the equation (a) are shown in FIG. FIG. 7 is a graph in which the values of the equation (a) and Comparative Example 2 are plotted. The mixed yarn was sweet twisted, used as a warp yarn and a weft yarn, woven, relax-scoured at 98 ° C., and finish-set at 170 ° C. to form a habutae. Table 1 shows the evaluation results of the texture of the obtained cloth. Although the obtained fabric had a firmness, it had a cored and hard texture, and lacked swelling and softness.

Comparative Example 4 The same spinning operation as in Example 1 was performed except that the ratio of the supplied amount of the polymer A to the polymer B was 10:90, and the composite ratio a: b of the polymer A and the polymer B was a: b. But 70:30 and 50:
It is composed of 4 types of single yarn groups of 50, 30:70, 0: 100, and the single yarn fineness is 1.0 denier (21 filaments), 2.5 denier (8 filaments), 3.6 denier (5 filaments). A multifilament mixed yarn of 75 denier and 37 filaments composed of four kinds of 5.3 denier (3 filaments) was obtained. The characteristics of this mixed fiber are shown in Table 1. The values related to the equation (a) are shown in FIG. FIG. 8 is a graph in which the equation (a) and the values of the second embodiment are plotted. This mixed yarn is shown in Table 1.
And, as shown in FIG. 8, the boiling water shrinkage ratio characteristics are not satisfied. The mixed yarn was sweet twisted, used as a warp yarn and a weft yarn, woven, relax-scoured at 98 ° C., and finish-set at 170 ° C. to form a habutae. Table 1 shows the evaluation results of the texture of the obtained cloth. The obtained fabric had a firm elasticity, but lacked a feeling of swelling, had a hard texture with a core, and lacked a feeling of softness.

Comparative Example 5 Polyethylene terephthalate having an intrinsic viscosity [η] of 0.66 and 12.9 mol% of isophthalic acid and 2,2 bis {4-
(2-hydroxyethoxy) phenyl} propane 2.
A modified polyester having an intrinsic viscosity [η] of 0.67 copolymerized with 0 mol% was used at a spinning temperature of 290 with an ordinary composite spinning machine.
Discharge from separate discharge holes from the same die at ℃ 1250
After winding at a speed of m / min, it is stretched by a usual method,
36.5 denier, 10 filament high shrink yarn and 3
A mixed yarn of 75 denier and 37 filaments composed of low shrinkage yarn of 6.5 denier and 27 filaments was obtained. This mixed fiber has the properties as shown in Table 1 or FIG. 9, and does not satisfy the boiling water shrinkage ratio property and the crimp property. FIG. 9 is a graph in which the values of Expression (a) and Comparative Example 1 are plotted. Sweetly twist this mixed yarn,
It was used as a warp yarn and a weft yarn, woven, relax-scoured at 98 ° C., and then finish-set at 170 ° C. to make a habutae. Table 1 shows the evaluation results of the texture of the obtained cloth. The obtained fabric had a swelling feeling and a firmness, but had a cored and hard texture, lacked a soft feeling, and had a very low stretchability of 3%.

[0059]

[Table 1]

[0060]

EFFECTS OF THE INVENTION The multiple different-shrinkage, different-fineness mixed yarn according to the present invention is composed of a composite of at least two kinds of fiber-forming polymers having different boiling water shrinkage ratios, and three or more kinds of single fibers having different composite ratios. Since it is composed of a yarn group, it is possible to obtain a mixed fiber that can express an extremely wide variety of textures. By using the mixed fiber, various high-grade clothing fabrics, for example, without a core, soft and swelling and elastic A fabric can be obtained. Also,
By imparting the crimping characteristics as described above, it becomes possible to impart stretchability, which has heretofore been unobtainable, to a fabric, and it is possible to provide a fabric full of high-class feeling for use in medium-thickness fabrics.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example of a spinning pack used in the present invention.

FIG. 2 is a plan view of the spinneret plate of FIG. 1 seen from above.

FIG. 3 is a graph in which the values of the formula (a) of the present invention and the values of Example 1 are plotted.

FIG. 4 is a graph in which the values of the formula (a) of the present invention and the values of Example 2 are plotted.

FIG. 5 is a graph in which the values of the formula (a) of the present invention and Comparative Example 1 are plotted.

FIG. 6 is a graph in which the values of the formula (a) of the present invention and Comparative Example 2 are plotted.

FIG. 7 is a graph in which the values of the formula (a) of the present invention and Comparative Example 3 are plotted.

FIG. 8 is a graph in which the values of the formula (a) of the present invention and Comparative Example 4 are plotted.

FIG. 9 is a graph in which the values of the formula (a) of the present invention and Comparative Example 5 are plotted.

[Explanation of Codes] 1: Pack body 2: Upper dispersion plate 3: Lower dispersion plate 4, 5: Polymer dispersion through hole 6: Die upper spacer 7: Polymer passage hole 8: Polymer dispersion hole 9: Spinneret plate 10 to 13: discharge holes 14 to 17: circular areas corresponding to the discharge amounts of the discharge holes

Claims (2)

[Claims] 1. A composite of at least two kinds of fiber-forming polymers having different shrinkage ratios, and is composed of three or more kinds of single yarn groups having different composite ratios, and at least one kind of the single yarn group is the above-mentioned. In a mixed yarn composed of a composite of at least two types of fiber-forming polymers, the fineness of the single yarn group having the largest single yarn fineness is 1.2 times or more the single yarn fineness of the single yarn group having the smallest single yarn fineness. A multiple different shrinkage different fineness mixed yarn, which is less than 8 times and satisfies the following physical properties. (1) When an integer number N (N ≧ 1) is given in order from the one having the smallest boiling water shrinkage ratio of the single yarns that compose the multiple different shrinkage and different fineness mixed yarns, the single yarn of the number N and the boiling water of the single yarns are given. The relationship with the contraction rate S _N is (30 × N / F) −15 ≦ S _N ≦ (30 × N / F) +10 (a) 0 ≦ S _{N + 1} −S _N ≦ 5 (b). However, F is the number of single yarns that compose the multiple different shrinkage different fineness mixed yarn, and 0 ≦ S _N. (2) When an integer number M (M ≧ 1) is given in order from the single yarn having the smallest single yarn fineness of the multiple yarns having the multiple different shrinkage and different fineness, the single yarn of the number M and boiling water of the single yarn are given. The relationship with the contraction rate S _M is However, when F is an odd number, the central value is treated as corresponding to both the left side and the right side. −5 ≦ S _{M + 1} −S _M ≦ 5 (d). 2. A crimp elongation rate K when dry-heated at 200 ° C. after boiling water treatment at 98 ° C. is 10% or more, and a crimp elongation rate K _{N of a} single yarn satisfies the following formula. Item 2. The multiple different shrinkage different fineness mixed yarn according to Item 1. [Equation 2] Is. However, if F is an odd number, set F / 2 to (F + 1)
Treated as / 2.