JPH03130428A - Blended interlacing yarn and its production - Google Patents

Abstract

PURPOSE:To obtain the subject novel yarn having excellent reeling quality from wound yarn layer, feeling, functionality or dyeing property, etc., and specific properties, comprising at least two species of filaments containing respectively specific highly shrinkable filament and low-shrinkable filament. CONSTITUTION:The aimed yarn is composed of at least two species of filament containing (A) highly shrinkable filament composed of polyester containing 2,2-bis{4-(2-hydroxy ethoxy)phenyl}propane as a copolymer component having 3.5-6 denier single fiber size without thick-and-thin unevenness in longitudinal direction and (B) polyester low-shrinkable filament having 0.4-2 denier single fiber size in thin part with thick-and-thin unevenness in longitudinal direction and having >=15% dry-heated yarn length difference after dry heat-treating under 2mg/d load at 170 deg.C for 5min, 150-250 pieces/m loops expanding from idealized yarn surface D, <=5 pieces/m loops having height >=0.35mn higher than idealized yarn surface A and >=50 CF value.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a mixed fiber entangled yarn and a method for producing the same. More specifically, the present invention relates to a novel processed yarn made of a mixed interwoven yarn of two or more filament yarns with different single fiber finenesses and heat shrinkage rates, and a method for producing the same.

The mixed fiber interlaced yarn of the present invention can be made into knitted fabrics, woven fabrics, braided fabrics, etc., and by taking advantage of its characteristics, it can be optimally used for high-class clothing applications, high-class decorative applications, and the like.

[Prior Art and Problems to be Solved by the Invention] It is well known that a mixed yarn having a difference in shrinkage rate, which is one of the constituent elements of the present invention, provides a knitted fabric with fullness.
Funatsuri manufacturing methods include spinning blending method, blending method during stretching,
There are methods such as blending drawn yarn.

Among these, there is a spinning and blending method in which two types of polyester, high-shrinkage polyester and low-shrinkage polyester, are spun using composite spinning equipment, and an undrawn polyester blend yarn is obtained in the spinning process, which is then drawn. is superior in terms of productivity.

In this spinning and blending method, a method using a copolymerized polyester as the high shrinkage polyester and a polyester without a copolymer component as the low shrinkage polyester is disclosed in Japanese Patent Publication No. 51-30620 and Japanese Patent Application Laid-open No. 49-7244.
It is disclosed in the publication number etc.

However, these publications describe differential shrinkage mixed fiber yarns that do not exhibit much yarn length difference in pure water treatment but develop yarn length differences in dry heat treatment; This is insufficient to achieve the extremely high bulge that is the objective of the present invention.

On the other hand, Japanese Patent Publication No. 60-35450 and Japanese Unexamined Patent Publication No. 55-5
'l013 publication describes polyethylene terephthalate as a low shrinkage component and 2,2-bis(4) as a high shrinkage component.
- Differential shrinkage blended yarn using copolymerized polyethylene terephthalate containing (2-hydroxyethoxy)phenyl)propane (hereinafter referred to as BHPP) at 5 mol% or more and 15 mol% or less based on the total gelcol components, and this blended yarn. Structured fabrics have been proposed.

According to these publications, the Fuji silk-like appearance and texture of the silky fabric obtained using the above-mentioned differential shrinkage mixed fiber yarns is due to the use of ordinary combinations other than the above-mentioned two types of polyester fiber materials (for example, isophthalic fibers as high-shrinkage components). When using copolymerized polyethylene terephthalate copolymerized with acid, phthalic acid, diethylene glycol, etc.), the copolymerization ratio of high shrinkage polyester, the shrinkage rate of the entire system, and the difference in pure water shrinkage rate between high shrinkage yarn and low shrinkage yarn. It is said that this cannot be obtained no matter how the conditions of the hydrothermal relaxation treatment are chosen.

That is, the above-mentioned differential shrinkage mixed fiber yarn has the disadvantage that only a fabric with a special appearance and texture corresponding to a specified polymer can be obtained. Moreover, the copolymer component B ) T P
P significantly deteriorates the light fastness of the copolymerized polyester compared to other copolymerized components (for example, isophthalic acid) that can constitute the highly shrinkable copolyester,
It could not be said that it was preferable in terms of dyeability.

Furthermore, in Japanese Patent Publication No. 61-13009, there is a difference in pure water shrinkage rate, and low shrinkage threads are polyethylene terephthalate, polyethylene terephthalate,
In the shrinkage mixed fiber yarn in which the high shrinkage yarn is a copolymerized polyester, B HP P is a specific example of the copolymerized polyester.
An example in which 10 mol % of is copolymerized is described in detail, but as mentioned above, the drawback of reduced light fastness cannot be avoided.

A method for imparting fineness unevenness to filament yarns is also a known technique. For example, in JP-A-50-88356, the birefringence of the thick part is 15 x 10-' to 80 x 10-'' and the birefringence of the thin part is 100 x 10''3 by non-uniform stretching under certain conditions. Thick and thin polyester yarns of ~200 x 10'3 are described. In other words, a filament yarn having this type of thickness unevenness is an uneven yarn in which a thickness portion close to the undrawn portion and a thickness portion close to the fully stretched portion coexist.

However, when these filament yarns with uneven thickness are made into knitted or woven fabrics and subjected to alkali weight reduction treatment unique to polyester knitted fabrics to obtain flexible fabrics, the thicker parts are selectively reduced in weight and become weaker, causing the fabric to become weaker. There is a drawback that functionality such as strength is extremely reduced.

Furthermore, conventional methods for providing loops or entanglements to multifilaments include Japanese Patent Publication No. 35-6684 and Japanese Patent Publication No. 35-13168. This method is called taslan processing, and involves creating countless protruding loops and slacks on the surface of the interlaced yarn, giving it a spun yarn-like appearance and texture.

However, Taslan processed yarn has many long and numerous loops and slacks that protrude on the surface of the interlaced yarn, which makes it difficult to unwind from the wound layer of the processed yarn, resulting in uneven unwinding tension and poor workability during knitting and weaving. It has the disadvantage that not only is the surface quality of the knitted fabric extremely poor, but also the surface quality of the knitted fabric is extremely degraded. In addition, in terms of texture, when heat treated in the dyeing and finishing process, all filaments shrink uniformly, each filament given by thread processing also shrinks uniformly, and the dispersion between each filament given by thread processing is reduced. It had the disadvantage of reducing its elasticity and giving it a so-called cored texture.

Also, Special Publication No. 62-60485, Special Publication No. 58-3
Japanese Patent No. 1415 proposes a method of shortening and reducing loops and slack on the surface of intertwined yarns. In particular, Japanese Patent Publication No. 58-31415 also describes combinations of filaments having different heat shrinkage rates and single fiber finenesses.

However, although these inventions improve the unwinding ability of the processed yarn from the wound layer compared to the above-mentioned Taslan processing, when the single fiber fineness range is the target of the present invention, it is difficult to unwind the processed yarn from the wound layer, especially when using high-fineness filaments. The loop will protrude from the thread surface,
As before, poor unrolling and the resulting defects have not been improved.

In any of the above-mentioned conventional techniques, it is possible to simultaneously obtain good handleability of processed yarn such as unwinding property, outstanding texture effect, functionality, and good dyeability using a mixed and entangled yarn of filament yarns. The reality is that it was difficult.

In view of the above-mentioned points, the present inventors have solved the numerous drawbacks and lack of characteristics of the conventional interlaced yarn of filament yarns, and have created an outstanding texture effect, functionality, and good dyeability. The present invention was developed as a result of extensive research into a novel mixed fiber yarn that can exhibit the following properties.

In other words, the object of the present invention is to develop a novel mixed fiber interlaced yarn that can be easily unwound from a processed thread-wound layer, has good yarn handling properties, and exhibits outstanding texture effects, functionality, and good dyeability. It is an object of the present invention to provide an interlaced yarn and a method for manufacturing the same.

[Means for Solving the Problem] In order to achieve the above-mentioned object, the mixed fiber entangled yarn of the present invention has the following features:
It has one of the following configurations. That is, it is a mixed fiber entangled yarn of two or more types of filaments, which is made of polyester containing isophthalic acid and 2,2-bis(4-(2-hydroxyethoxy)phenyl)propane as copolymer components, and is substantially woven in the longitudinal direction. It is made of highly shrinkable filaments with a uniform fiber fineness of 3.5 to 6.0 deniers and polyester, and has thick and fine irregularities in the longitudinal direction, with a single fiber fineness of 0.4 to 2. .0 denier low shrinkage filament, 170℃ under 2mg/d load of mixed fiber entangled yarn
, the dry heat yarn length difference ratio after 5 minutes of dry heat treatment is 15% or more, the number of loops above the virtual yarn surface (hereinafter referred to as the number of D loops) defined next is 150 to 250/m1 the virtual yarn defined next. An intertwined yarn characterized by having 5 or less loops (hereinafter referred to as the number of A loops) with a height of 0.35 mm or more from the yarn surface A and a CF value of 50 or more, or two or more types A mixed fiber entangled yarn of filaments, containing isophthalic acid and 2,2-bis(4-(2-
A highly shrinkable filament made of polyester containing hydroxyethoxy)phenyl)propane and having thick and thin unevenness in the longitudinal direction and a single fiber fineness of 3.5 to 6.0 deniers in the fine filament portion, and Contains low shrinkage filaments with fine unevenness and a single fiber fineness of 0.4 to 2.0 denier, and 2 mg/d of mixed fiber entangled yarn.
Dry heat yarn length difference ratio after dry heat treatment at 170℃ for 5 minutes under load is 15
% or more, the number of D loops is 150 to 250/m, the number of A loops is 5 or less/m, and the CF value is 50 or more.

The number of D loops, the number of A loops, and the virtual yarn surface D1 and virtual yarn surface A on which these are measured are determined as follows.

Number of D loops, number of A loops> FRAY C0UNTER manufactured by Toshi Engineering ■
DT-104 type), the yarn speed was 25 m/min, and the running yarn tension at the measuring section was 1.0 g/d when measuring the number of D loops.

In the case of measuring the number of A loops, the number of loops is measured over a distance of 25 m under 0.1 g/d, the number of loops per 1 m is determined, and the average value of the three points is expressed. In this case, the number of loops above the virtual yarn surface of the processed yarn is the number D loops, and the number of loops at a height of 0.35 mm or more from the virtual yarn surface A of the processed yarn is A.
is the number of loops.

Here, the virtual yarn surface height of the processed yarn is the height that indicates the maximum number of loops when the number of loops is measured by changing the height from the yarn surface under the tension conditions of D loop number measurement in advance, and
The height of the virtual yarn surface A of the processed yarn from the yarn surface was changed in advance according to the tension conditions for measuring the number of loops A, and the height was set to the height that indicates the maximum number of loops when the number of loops was measured.

Further, the CF value is determined as follows.

<CF value> As shown in FIG. 4, the sample yarn is hung on a grooved pulley that can rotate left and right around the central axis without resistance so as not to slip, and a load N I XN 2 is applied at two locations. Load N I XN
2 is 0.4 times the average fineness of the sample yarn in grams. Next, a fixed needle N having an outer diameter of 0.6 mm is stabbed and fixed at substantially the center of the filament bundle constituting the sample thread at a right angle. A load N3 of 0.1 times the average fineness of the sample yarn in grams is applied to the load N1 applied to the left side of the sample yarn, and the sample yarn moves to the left until it stops. Next, the load N3 applied to the load N1 is removed and applied in addition to the load N2 on the right side, and the sample yarn is moved to the right side by the load N3 until it stops. The distance L (mm) of movement of the sample thread to the right by the above method is determined, and the CF value is calculated using the following formula. Measurement was performed on 20 pieces, and the average value was displayed.

. , value=1000/+0. 60 Furthermore, the method for producing a mixed fiber entangled yarn of the present invention has any of the following configurations. That is, in the method for producing a mixed fiber entangled yarn, a highly shrinkable filament having a single fiber fineness of 3.5 to 6.0 denier with substantially no thick or thin unevenness in the longitudinal direction and a high shrinkage filament having thick and thin unevenness in the longitudinal direction is used. The constituent yarns containing low shrinkage filaments with a single fiber fineness of 0.4 to 2.0 deniers are subjected to fluid turbulence treatment in a 3 to 9% overfeed state to be entangled, and then heat treated. A method for producing a mixed fiber entangled yarn or a method for producing a mixed fiber entangled yarn, which has thick and thin unevenness in the longitudinal direction and has a high single fiber fineness of 3.5 to 6.0 tenier in the fine yarn portion. A component yarn containing a shrinkage filament and a low shrinkage filament having thick and thin unevenness in the longitudinal direction and having a single fiber fineness of 0, 4 to 2.0 deniers in the fine yarn part is subjected to fluid turbulence under a 3 to 9% overfeed state. This is a method for producing a mixed fiber entangled yarn, which is characterized in that after being flow-treated and entangled, a heat treatment is performed.

[Function] Hereinafter, the mixed fiber entangled yarn of the present invention and the method for manufacturing the same will be explained according to the drawings and the like.

In FIG. 1, a differentially shrinkable undrawn yarn 1, which is a composite spun yarn of two types of polyester, a high-shrinkage component and a low-shrinkage component, is used as the supply yarn, and is supplied to the supply roller 4 through a guide 2.3. The yarn is wound around a stretching pin 5 between a stretching roller 7 and passed through a stretching heating element 6 to form a semi-drawn yarn having a partially unstretched thick yarn portion, and this semi-drawn yarn is supplied to a fluid nozzle 9 through a guide 8. After that, the yarn is intertwined in a relaxed state with the relax roller 10, and the fibers are intertwined while increasing the fiber intertwining properties to create loops and slack on the surface of the yarn. This is an example of a method for manufacturing the mixed fiber entangled yarn of the present invention, in which loops and slack on the surface of the entangled yarn are shortened in step 11 and wound into a winding package 13.

In the present invention, the filament yarns to be supplied include, in addition to differentially shrinkage blended undrawn yarns obtained by composite spinning of two types of polyesters, high-shrinkage component and low-shrinkage component, for example, undrawn yarns containing only low-shrinkage component polyester yarns. After forming the semi-drawn yarn, it may be supplied to the fluid nozzle 9 while being mixed with a normally drawn yarn of a high shrinkage component polyester yarn, and then processed in the same manner as in the above example.

Fig. 2-A1 Fig. 2-B and Fig. 2-C are schematic diagrams of the yarn side showing an example of the mixed fiber entangled yarn obtained by the processed yarn manufacturing method of the present invention. Normally drawn yarn only, low shrinkage filaments are thin yarn part 15 and thick yarn part 1
An example configured with 5' is shown below.

Figure 2-8 shows that high shrinkage filaments 14 of high fineness and low shrinkage filaments 15 of low fineness mutually move in the yarn cross-sectional direction in the intermediate process of producing processed yarn after the fibers are mixed and entangled in the fluid nozzle as shown in Figure 1. This shows a state in which the particles are intertwined while being mixed, forming a partial loop.

Moreover, FIG. 2-B is a schematic diagram of the processed yarn obtained by the processed yarn manufacturing method of the present invention, and the loops and slack on the yarn surface obtained in FIG. 2-A are shortened by the heating element 11 of FIG. Indicates the state in which the

Furthermore, FIG. 2-C shows that the processed yarn (FIG. 2-B) obtained by the method for producing a mixed fiber entangled yarn of the present invention is made into a knitted fabric using wet heat or dry heat during scouring or dyeing. The structure of the high shrinkage filament 14 with high fineness and the low shrinkage filament 15 with low fineness is shown.

As can be seen from the figure, high shrinkage filaments with high fineness are necessary to give the texture of yarns and knitted fabrics, especially outstanding tension and elasticity. The single fiber fineness of the fine thread portion is set to 3.5 denier or more and 6 denier or less, and it is more preferable to use a filament yarn of 4.5 denier or more and 6 denier or less. In this high shrinkage filament fineness range,
When arranged parallel to the length of the yarn, as with conventional heat-shrinkable mixed fiber yarns, the texture tends to be lopsided rather than firm and firm, and is generally cut. In the present invention,
For example, as shown in 14 in FIG. 2-C, even if the fabric is highly shrunk, it still has an apparent three-dimensional crimp, and gives a spring-like effect to the bending of the knitted fabric, giving it a preferable feel.

If the high-shrinkage filament does not have substantially thick or thin unevenness in the longitudinal direction, if the single fiber fineness is lower than 3.5 denier, it will lack the desired tension and stiffness, and if it is higher than 6 denier,
Rather than firmness and waist, it has a hard and core texture, which is not desirable.

In addition, low-shrinkage filament is a necessary component to give yarns and knitted fabrics a soft surface touch while having outstanding tension and stiffness, and it reduces the single fiber fineness of the fine yarn part to 0.4 denier. denier or more and 2.0 denier or less, and 0.6
It is more preferable to set the denier to 1.25 denier or more. If the fineness of the low-shrinkage filament is lower than 0.4 denier, it will be difficult to obtain the desired color, especially the deep color effect, when dyeing yarn or knitted fabric, while if it is higher than 2.0 denier, a noticeably soft surface touch will be obtained. It's difficult and undesirable.

In the present invention, when the high shrinkage filament or the low shrinkage filament has thick and thin unevenness, the fine yarn portion single fiber fineness means the average value of the fine yarn portion single fiber fineness.

Furthermore, the difference in shrinkage between high-shrinkage filaments and low-shrinkage filaments gives a remarkable effect on the texture of yarns and knitted fabrics, especially the fullness. The heat shrinkage rate of the filament is made higher than that of a low shrinkage filament.

2m of high shrinkage filament to give it fullness.
It is preferable that the dry heat shrinkage rate after dry heat treatment at 170'C for 5 minutes under g/d load is 29% or more. The dry heat shrinkage rate after dry heat treatment at 170°C for 5 minutes under a load of 2 mg/d is lower than that of the high shrinkage filament, and
The content is preferably 11% or more.

Here, the dry heat shrinkage rate after dry heat treatment at 170° C. for 5 minutes under a load of 2 mg/d is the shrinkage rate of the yarn exiting the drawing roller 7 in FIG. 1, that is, the drawn filament yarn or semi-drawn filament yarn. It was obtained as follows.

<Dry heat shrinkage rate after dry heat treatment at 170°C for 5 minutes at 2 mg/dH> The filament yarn is broken down into constituent single fibers one by one, and the fineness of each single fiber is measured using Denicom manufactured by Asahiko Seiko ■. . After applying a load of 0.1 g/d to each single fiber and marking a length of 10 cm, 2 mg/d
170℃ in a hot air dryer with a load applied.

Process for 5 minutes. 0.0 for each treated single fiber. 1g/
Apply a load of d and read the length (cm) after shrinkage, classify it into a high shrinkage filament group, a low shrinkage filament group, and depending on the combination, a medium shrinkage group, calculate with the following formula, and Dry heat shrinkage rate of high shrinkage filament at average value (
H8) and dry heat shrinkage rate of low shrinkage filament (L S
).

H8 (%) = 10 - Average length of high 1 filament group x 1000 LS (%) 1 〇 - Average ux of low shrinkage filament group 10
00 In order to satisfy the above shrinkage characteristics, the polymer composition of the high shrinkage filament is preferably a polyester containing isophthalic acid and B)IPP as copolymer components,
The preferred range of copolymerization rate is I below.

■It is a range that simultaneously satisfies the formula.

7≦P (a) + P (b) ≦18.0 ・
11, 0≦P (b) ≦4.8...
■However, P (a) is the molar fraction (%) of isophthalic acid based on the total acid components in the copolymerized polyester, p (b)
is B based on all glycol components in the copolymerized polyester.
It is the molar fraction (%) of HPP (hereinafter referred to as P (a),
P (b) is the same as above).

A copolymerized polyester containing isophthalic acid or BHPP alone as a copolymerization component satisfies the requirements regarding the shrinkage characteristics of the present invention, but is not suitable for processed yarns for obtaining high-quality knitted fabrics from the viewpoints of hand and dyeability. It's difficult.

That is, the high shrinkage filaments constituting the differential shrinkage mixed fiber yarn of the present invention can be prepared by adding isophthalic acid and BHPP as copolymerization components, especially when co-spun undrawn yarn with ordinary polyester is used as a low shrinkage filament component. A range that satisfies formula I, that is, P (a) + P (b)
It is desirable that the copolyester contains 7.0 or more, more preferably 9.0 or more, from the viewpoint of easily obtaining the targeted shrinkage rate difference.

On the other hand, when the obtained processed yarn is dyed into a knitted fabric, the temperature is 210°C, which requires careful attention to the processing temperature, etc.
In order not to lower the melting point of the copolymerized polyester to below, it is necessary to use isophthalic acid and BHPP as copolymerization components within a range that satisfies the above formula I, that is, P (a) + P
It is desirable that the copolymerized polyester contains (b) 18.0 or less, and more preferably 16.0 or less.

B HP Copolymerized polyester containing P as a copolymerization component is estimated to cause strong shrinkage even under the restraint of the knitted fabric structure, and from the viewpoint of easily obtaining sufficient bulge in the knitted fabric, P (b) is set to 1.0. The value of p(b) is preferably 4.8 or less, more preferably 4.6 or less from the viewpoint of not reducing light fastness.

In the present invention, as described above, it is necessary to use a filament yarn in which at least a high shrinkage filament with a high fineness and a low shrinkage filament with a low fineness are mixed. For example, Figure 2-A
1 Figure 2-B1 Figure 2-C shows low fineness and low shrinkage filaments. When drawing an undrawn yarn, the filament is made into an undrawn yarn that is thick and thin in the longitudinal direction, and there are no undrawn filaments in the thin yarn part. It is desirable to use a semi-drawn yarn in which thick yarn portions 15' due to drawing are partially mixed.

The effect of this semi-drawn yarn is that when the mixed fiber entangled yarn of the present invention is knitted or woven and subjected to alkali weight loss treatment unique to polyester fabrics to obtain a flexible fabric, the undrawn portion is selectively weighted down. The purpose of the present invention is to provide a distinctive fluffy feel and soft feel, which is one of the objects of the present invention, by weakening the fibers and cutting them by the kneading action during processing.

In order to sufficiently cause strong deterioration of the undrawn portion 15' by alkali treatment and to facilitate cutting and fluffing, the manufacturing conditions for the undrawn yarn are preferably a spinning speed of 4200 m/min or less. This unstretched portion 15' may be provided not only to the low shrinkage component yarn but also to all the constituent filaments of the textured yarn.

As for the thick and fine fineness unevenness due to semi-stretching, in order to fully exhibit the desired fluffiness and maintain functionality such as strength in the fabric, the U% is 0.7 to 8%, and further, 1 .5~6
% is preferable.

Here, U% means that the filament yarn after drawing during the processing of the present invention is pulled out, and the commercially available Usfer Ev manufactured by Keizokuki Kogyo ■ is used.
Using enness Te5ler, yarn speed 25m/m
in, twister rotation speed 150 Orpm, N
normalTest, slot selection corresponding to fineness, chart speed 5 cm/min, range ±12.5, thread unevenness value was read for 3 minutes with the included integrator, and the average value of 5 measurements was calculated. be.

The method for obtaining this yarn unevenness is to use a spinning speed of 4200 m.
/min or less by stretching an undrawn yarn at a low magnification. In other words, heating pins, heating rollers, hot plates, etc. may be appropriately installed between the rollers that supply the undrawn yarn at a constant speed and the rollers that take it off at a constant speed under a constant magnification, but in the case of polyester fibers, In particular, a combination of a heating pin and a hot plate or a heating roller and a hot plate is preferred from the standpoint of stably forming thick and thin fibers in the longitudinal direction of the fibers.

However, in the case of thick and thin drawn yarn, in order to fully exhibit the desired fluffiness and maintain functionality such as strength in the fabric, the drawing ratio is (1 + constant stress elongation region elongation x 0 ．．
8) times to (1+constant stress elongation region elongation Xi, 7) times, more preferably (1+constant stress elongation region elongation Xi, 0) times to (1+constant stress elongation region elongation Xi, 3) times. .

Incidentally, the thermal shrinkage rate of the filament yarn to be supplied to the next mixed fiber entanglement can be controlled by the hot plate temperature in the drawing zone. Here, the elongation in the constant stress elongation region is defined as the elongation from the first inflection point of the strength/elongation curve obtained by pulling the undrawn yarn using an Instron type tensile tester, as shown in Figure 6. Elongation at the intersection of the tangent T of the part of the curve between the secondary inflection points that is close to a straight line and the tangent T2 of the part of the curve that is close to the straight line between the secondary inflection point and the tertiary inflection point. This is a value expressed in degrees C (%).

In the manufacturing method of the present invention, these drawn filament yarns are supplied to a fluid nozzle as shown in Fig. 1, subjected to fluid turbulence treatment, and further entangled while increasing the fiber blending properties to form loops and loops on the yarn surface. Gives slack. The fluid used here is an inert gas such as air or nitrogen.

In the manufacturing method of the present invention, the overfeed rate between the stretching roller 7 and the relaxation roller 1o during this fluid turbulence treatment is an important factor.

First, in the manufacturing method of the present invention, the overfeed rate is set to 3% or more, and more preferably 4% or more. If the overfeed rate is less than 3%, the mixing and entangling of the constituent filaments will be insufficient, and it will be difficult to sufficiently bend and entangle the constituent filaments.

On the other hand, in the manufacturing method of the present invention, the overfeed rate is set to 9% or less, and more preferably 7% or less. If the overfeed rate exceeds 9%,
The loops and slack on the yarn surface become high and the heating element 11
It becomes difficult to shorten yarn surface loops and slack during heat treatment.

The overfeed rate here is a value determined as follows.

<Overfeed rate> Overfeed rate (%) = Stretch roller surface speed - Relax roller surface speed
Surface speed of the X100 drawing roller Figure 3 shows a model of the side of the interlaced yarn obtained by the conventional rath run method.There are countless long loops on the surface of the entangled yarn, and there are many loops from the processed thread wound layer. As already mentioned, the unwinding property is poor and uneven unwinding tension occurs, which not only significantly deteriorates the workability during weaving and weaving, but also extremely deteriorates the surface quality of the knitted fabric.

In the present invention, in order to eliminate these drawbacks and at the same time create a textured yarn structure that does not cause the above-mentioned defects even if it has surface loops of high shrinkage filaments, for example, heat treatment is performed using a heating element 11 as shown in FIG. It is necessary to shorten the loops and slack on the thread surface. That is, the number of D loops, which is a guideline for small loops, is 150 to 250/m, and the number of A loops, which is a guideline for coarse loops, is 5 or less/m.

The heat treatment is carried out by heating the intertwined yarn by running it in direct contact with a hot plate, or by non-contact heating using a tube heater, etc. In short, the loops and slack on the yarn surface are reduced to within the above range. Any method that can control the temperature is fine.

In addition, as shown in A in Fig. 2-C, the processed yarn obtained by the present invention has an apparent three-dimensional crimp even after high shrinkage, and exerts a spring-like action on the bending of the knitted fabric. From this point of view, the number of D loops, which is a measure of the degree of bending of a single fiber, should be 150 or more/m, and the CF value should be 50 or more.

Furthermore, it suppresses the tendency of the thick yarn portion to easily deteriorate due to heat or chemicals, which is a drawback of the yarn of the present invention, which has a thin yarn portion and a thick yarn portion due to undrawn yarn, which is obtained by semi-drawing an undrawn yarn. The number of D loops and the CF value are set within the above ranges from the viewpoint of reducing the decrease in strength of the entire processed yarn.

FIG. 5-A and FIG. 5-B are model diagrams of preferred cross sections of filaments used in the present invention.

The cross-sectional shape of the processed yarn of the present invention is such that the single fibers in the processed yarn are bent with respect to the yarn axis as described above, and when dyed into a knitted fabric, it exhibits a remarkable fullness. A trilobal cross section is preferable because it tends to have a glossy appearance, which tends to reduce the sense of luxury.

Furthermore, in a composite synthetic fiber consisting of A component and B component as shown in Figure 5-, A7jj19 is a polymer that has higher solubility in the same solvent than B component, and has a cross-sectional shape of three leaves or more. It has a multi-lobed shape, and A5 is a fiber that is composited at the tip of the multi-lobed in an arrow shape that tapers toward the center of the cross section, and this processed yarn is made into a knitted fabric to create a part or all of A [. When the fibers are melted and tapered arrow-shaped grooves are created in the inner direction of the fibers as shown in Figure 5-B, it gives a real silk-like ringing and a smooth surface touch, resulting in an even higher quality texture. It is particularly preferable because it can be

As a polymer that can easily achieve the above-mentioned contents of the present invention, it is desirable to use polyester containing ethylene terephthalate as a main component for both high-shrinkage filaments and low-shrinkage filaments.

In order to exhibit a fluffing effect in knitted fabrics and woven fabrics, and to facilitate the design and dyeing process of knitted fabrics and woven fabrics, and at the same time to exhibit outstanding fluffiness in knitted fabrics and woven fabrics using the yarn of the present invention, it is necessary to use the blended fibers of the present invention. The boiling water shrinkage rate of interlaced yarn is 10-18%
It is desirable to do so.

Here, the boiling water shrinkage rate was determined as follows.

Boiling water shrinkage rate of mixed fiber entangled yarn> Check the 10 turns using a measuring device with a frame circumference of 1 m, and apply a load of 1/10 gram (0.1 g/d) of the fineness of the processed yarn in advance. After reading the length (lo), wrap the locus in gauze and place in boiling water for 30 minutes.

The length after shrinkage (lI) is read by applying the above load to the treated fibers and calculated using the following formula, and the shrinkage rate is determined by the average value of 5 times.

Boiling water shrinkage rate (%) of mixed fiber entangled yarn = ′. ” And to give a soft surface touch,
It is necessary to make the heat shrinkage rate of the high shrinkage filament higher than that of the low shrinkage filament. Considering the processing conditions of the knitted fabric, this difference in shrinkage rate is preferably such that the dry heat shrinkage rate of the high shrinkage filament after dry heat treatment at 170° C. for 5 minutes under a load of 2 mg/d is 19% or more.

In addition, the dry heat of mixed fiber entangled yarn was 170℃ under a load of 2 mg/d, 5
The dry heat yarn length difference ratio after the dry heat treatment is 15% or more. If the dry heat yarn length difference ratio is less than 15%, it will not be possible to obtain the outstanding fullness that is the aim of the present invention.

In addition, it is generally difficult to set the dry heat yarn length difference ratio to 30% or more while reducing the loop height on the yarn surface.

Here, the dry heat yarn length difference ratio was determined as follows.

<Dry heat yarn length difference ratio> The mixed fiber entangled yarn is carefully disassembled into constituent single fibers one by one using a disassembly needle in advance, and the fineness of each single fiber is measured using Denicom manufactured by Asahiko Seiko ■. This individual filament has 0.
After applying a load of 1 g/d and marking a length of 10 cm. 170℃ in a hot air dryer with a load of 2mg/d
, process for 5 minutes. 0.1g/individual treated filament
Apply a load of d and read the length (cm) after shrinkage, classify it into a high shrinkage fiber group, a low shrinkage fiber group, and depending on the combination, a medium shrinkage group, calculate with the following formula, and calculate the average of 5 points. The dry heat shrinkage rate (H8+) of the high shrinkage filament, the dry heat shrinkage rate (LS+) of the low shrinkage filament, and the dry heat yarn length difference ratio are calculated from the values.

H8+ (%) = 10-average length of high shrinkage filament group X 1000 LS+ (%) = 10-average length of low shrinkage filament group H8゜〈Lightfastness〉 Each level sample after alkali weight loss treatment was treated with disperse dye (Re
Soline Blue FBL) was separately stained and used as a sample for light fastness evaluation, and the evaluation was JtSL.
0842 (carbon arc lamp method) was evaluated in 8 stages. Grade 8 is the best, and as the grade decreases, the firmness worsens. The goal of the present invention was to pass grade 4 or higher in terms of light fastness and waxiness.

[Example] Hereinafter, based on Examples, a specific manufacturing method and effects of the mixed fiber entangled yarn exhibiting the novel texture of the present invention will be described in more detail.

(Example 1) After carrying out an ester reaction using terephthalic acid/ethylene glycol and isophthalic acid/ethylene glycol slurries, an ethylene glycol solution of BHPP was added, polymerization was carried out by a conventional method, and the molar fraction of isophthalic acid was Chips of highly shrinkable copolymerized polyethylene terephthalate were obtained by changing the molar fractions of BHP and BHPP to 9 levels as shown in Table 1.

Using this chip and a low-shrinkage polyethylene terephthalate chip obtained by a conventional method, mixed fibers were spun from the same spinneret at a spinning speed of 1450 m/min, and the blended fibers of the present invention were spun using a draw-mixed-fiber entangling machine as shown in Fig. 1. Processed yarn.

In this case, the processing conditions are the same for all 9 levels, 314
The speed of the stretching roller 7 is m/min, the temperature of the stretching pin 5 is 85°C, the temperature of the stretching hot plate 6 is 125°C, and the stretching ratio is 2.89.
After being stretched five times, it was continuously supplied to the fluid nozzle 9.

The air pressure of this fluid nozzle is 3. 5kg/af.

170°C with a relaxation rate (overfeed rate) between the stretching roller and the relaxation roller 10 of 5.0%,
The sample was heat-treated by being run in contact with a 30 cm hot plate-shaped heating element 11.

Note that both the high-shrinkage component yarn and the low-shrinkage component yarn have a trilobal cross section, and the average fineness of the fine yarn portion in the state of semi-drawn yarn with thick and thin unevenness after leaving the drawing roller 7 is approximately 30 denier for both the fractional component yarns. So, the single fiber fineness of the fine yarn part of the high shrinkage filament is 5 denier, and the single fiber fineness of the fine yarn part of the low shrinkage filament is 1.25.
It was denier.

However, in Level 5, the melting point of the highly shrinkable polymer decreased to about 205° C., and yarn breakage occurred frequently during spinning and drawing, making stable yarn spinning impossible, so further studies were discontinued.

Therefore, for the remaining 8 levels, using a down twister, one warp yarn was given an S twist of 100 OT/m, and two weft yarns were pulled together and given an S twist of 1000 T/m, resulting in a gray fabric density of 197 vertical yarns. The fabric was woven into a cashmere structure with a width of 90 strands/in and a width of 90 strands/in, scouring and intermediate setting using the usual dyeing process for polyester fabrics, and after an alkali weight loss process of about 24%, it was dyed plain black.

Table 1 shows the texture, weavability, and yarn characteristics of these dyed fabrics.

In addition, level N112. 3. 4. 7. 8. 9 is an example of the present invention, level N (Ll), and 5.6 is a comparative example.

(Hereinafter, blank space) As is clear from Table 1, as a high shrinkage component yarn, P (a) + P (b) is 7.0 when judged comprehensively.
~18.0, p (b) is in the range of 1.0 to 4.8, the spinning and drawing properties and the light fastness of the dyed product, which are the aims of the present invention, are particularly good, and the product has outstanding fullness. A fabric with excellent performance was obtained.

(Example 2) A chip of high-shrinkage copolymerized polyethylene terephthalate was obtained in the same manner as level Nα3 of Example 1, and this chip and a chip of low-shrinkage polyethylene terephthalate obtained by a normal method were used, and the same die was used. A blended yarn is spun from
The yarn of the present invention was processed using a drawing, blending, and entangling machine as shown in FIG.

In this case, only the spinning speed and drawing conditions were changed, and the processing was otherwise carried out under the same conditions as the level Nα3 of Example 1 to obtain processed yarns of 7 levels, which were made into similar fabrics.

Table 2 shows the texture, weavability, and yarn characteristics of these dyed fabrics.

(Hereinafter, blank space) As is clear from Table 2, in order to obtain fluff or a fluffy feel after the alkali weight loss treatment, which is one of the aims of the present invention, the spinning speed should be 4200 m/min or less, and the thickness during stretching should be Fine unevenness (U%) is 0. It has been found that a range of 7 to 8% is particularly preferable.

(Example 3) A chip of high shrinkage copolymerized polyethylene terephthalate was obtained in the same manner as level Nα3 of Example 1, and this chip and a chip of low shrinkage polyethylene terephthalate obtained by a normal method were used, and each was separately prepared. Spinning speed 14
The yarn of the present invention was spun at 50 m/min and processed using a fiber interlacing machine as shown in FIG.

At this time, we used high-shrinkage undrawn filament yarn and low-shrinkage undrawn filament yarn, and
At a speed of the stretching roller 7 of n, the temperature of the stretching pin 5 is 85°C.
After stretching at a stretching ratio of 2.895 times under these conditions, the film was continuously supplied to the fluid nozzle 9.

The air pressure of this fluid nozzle, the relaxation rate (overfeed rate) between the stretching roller and relaxation roller 10, and the temperature of the stretching heating element 6 are changed, and the temperature of the 30 cm long heating element 11 is fixed at 170°C. Thus, 24 levels of processed yarn shown in Table 3 were produced.

The high-shrinkage component yarn is a round cross-section yarn, and the low-shrinkage component yarn is a trilobal cross-section yarn, which is stretched between the supply roller 4 and the stretching roller shown in FIG. 1 and supplied to the fluid nozzle 9. As for the yarn, both high shrinkage component yarn and low shrinkage component yarn are about 30
Made of denier.

Note that the level Nα17. 18. 19. 22. 23
゜24.28, 29, 31.32, 35.38゜39 is an example of the present invention, level Nα16, 20.21゜25.2
6, 27, 30, 33, 34, and 36.37 are comparative examples.

These 24 levels of processed yarn are processed using a down twister.
00 T#n S twist is applied to the warp yarn, and the weft yarn is a regular 100 denier 96 filament polyester yarn with 2300 T/m S and Z twist, and the two are used alternately. Vertical 168/in, horizontal 82
I made a book/in handloom.

As is clear from Table 3, the number of D loops of processed yarn is 250.
When the number of A loops exceeds 5 x 7 m, the loops on the surface of the processed yarn become entangled with each other during twisting in a down twister, resulting in poor unwinding properties and frequent yarn breakage. Moreover, at this level, poor warp spacing occurred during weaving, and weavability was also poor.

Furthermore, including these levels with poor weavability, using the usual dyeing processing methods for polyester fabrics, scouring, intermediate setting, alkali reduction processing, dyeing a plain eggplant navy blue, and depending on the shrinkage characteristics of each level, length 198 ~ 201 pieces/in,
Y: Finished fabric with 1115 to 119 pieces/in. Table 3 shows the overall evaluation results including the texture of these dyed fabrics and the weavability of each level.

(Hereinafter, blank space) Among these examples, especially the level Nα18.19°24
．． The processed yarns of 28, 29, and 35 have good weavability and dyeing processability, and the fabrics after dyeing have outstanding fullness, tension, elasticity, softness, and fluffiness that cannot be obtained with conventional polyester fabrics. An extremely excellent fabric was obtained that did not impair the depth of the dark color.

(Example 4) Chips of highly shrinkable copolymerized polyethylene terephthalate were used as the B component of the trilobal cross section as shown in Figure 5-A in the same manner as level Nα3 of Example 1, and the chips were obtained by the usual method. BffJ is a spinneret for spinning low-shrinkage polyethylene terephthalate chips into filaments with a trilobal cross-section as shown in FIG.
minutes, and then further use the above 255. The A component of the filament is polyethylene terephthalate 25 copolymerized with 5 mol% of 5-sodium sulfoisophthalate.
Weight% and regular polyethylene terephthalate 75% by weight
Three-component composite spinning was performed using a blended polymer. The composite ratio of component A and component B was A:B=15:85 for both high shrinkage filaments and low shrinkage filaments, and the spinning speed was 1450 m/min.

The obtained composite yarn undrawn yarn is supplied to a supply roller 4 using a stretching entangling machine as shown in FIG.
Stretching roller 7 with winding and surface speed of 333 m/min
It was extended between

Here, the temperature of the stretching heating element 6 is 115°C, and the stretching ratio is 2.
The mixed fiber yarn after drawing was divided into high shrinkage filament component yarn and low shrinkage filament yarn, and the semi-drawn yarn with thick and fine unevenness was dry-heated with high shrinkage filament component yarn having 32 denier and 9 filaments. 2 mg/d under load 170
℃, the dry heat shrinkage rate after 5 minutes treatment is 36.3%, the low shrinkage filament weight yarn is 43 denier, and the dry heat shrinkage rate after 5 minutes treatment at 170℃ under a dry heat load of 2 mg/d with 24 filaments. It was 15.8%. This drawn mixed fiber yarn was continuously entangled with a fluid turbulence nozzle 9 under the same conditions as the level Nα3 of Example 1, and a 1606C, 90cm tube heater-shaped heating element 1
The yarn was heat-treated to shorten loops and slack on the surface of the yarn by running the yarn through a winding device 13, and then wound into a winding device 13 to obtain a mixed fiber entangled yarn.

The obtained mixed fiber entangled yarn has a high shrinkage yarn dry heat shrinkage rate of 25.1%.
, dry heat yarn length difference rate 19.2%, entangled yarn boiling water shrinkage rate 13.
4%, D loop number 213/m.

The number of A loops was 0/m, and the C1 value was 124.

One warp yarn of this mixed fiber entangled yarn is 900T/m in the S direction.
, the two weft yarns are aligned and twisted at 900 T/m in the S direction using a down twister, and the vertical density of the fabric is 167 yarns/in.
Woven from cashmere tissue with 71 strands/in width. The twistability and weavability were good.

This gray fabric was scoured, intermediate set, and alkali reduced using the usual dyeing methods for polyester fabrics, and dyed plain brown. The alkali weight loss rate was 26%, and the finished density was 216 vertical lines/in.

Finished with a woven fabric with a width of 109 strands/in.

The resulting fabric has outstanding fullness, waist, tension, and softness, with no noticeable dyeing irritation, and the surface touch has a fluffy and dry feel, giving it an extremely novel texture with a silky feel similar to real silk. It was a good quality fabric.

[Effects of the Invention] The present invention provides an interlaced yarn that has loops and slacks on the yarn surface, but has good yarn handling properties during weaving, such as unwinding from the processed yarn wound layer and opening properties during weaving. This mixed fiber interlaced yarn can provide knitted fabrics with a new texture that has a small decrease in waxiness in the dyeing room and has outstanding fullness, elasticity, tension, and softness. The present invention provides a technology for inexpensively manufacturing a mixed fiber entangled yarn that has a fluffy feel similar to that of a natural product under stable processing conditions.

[Brief explanation of the drawing]

FIG. 1 is a process schematic diagram illustrating one embodiment of the process of manufacturing the mixed fiber entangled yarn of the present invention, FIG. 2 A1 FIG. 2-B1
Figure 2-C is a schematic side view of the yarn side showing a model of the structure of an example of the mixed fiber entangled yarn of the present invention, and Figure 3 is a side view of the yarn showing a model of the yarn structure of a conventional fluid turbulence treatment system. It is a schematic diagram. FIG. 4 is a schematic diagram of an entanglement window measuring device for expressing the degree of intertwining of mixed fibers of the present invention, FIGS. The figure is a strength/elongation curve that explains the elongation in the constant stress elongation region. In the figure, 1: Undrawn yarn 2.3 guide 4: Supply roller 5: Stretching pin 6: Stretching heating body 7: Stretching roller 8 Guide 9: Fluid nozzle O: Relaxation roller 1: Heating body 2: Take-out roller 3: Winding Pulling device 4: High-fiber, high-shrinkage filament 5: Low-shrinkage filament, low-fineness 5': Thick yarn portion due to undrawn: Fixed needle, N2, N3: Load: Easily soluble component: Slightly soluble component: Constant stress elongation area elongation

Claims (5)

[Claims] (1) A mixed fiber entangled yarn of two or more types of filaments,
Isophthalic acid and 2,2-bis{4-
(2-Hydroxyethoxy)phenyl}propane-containing high shrinkage filament with substantially no unevenness in the longitudinal direction and a single fiber fineness of 3.5 to 6.0 deniers, and polyester in the longitudinal direction. 2 mg of mixed fiber entangled yarn containing low shrinkage filaments with thick and fine unevenness and a single fiber fineness of the fine yarn portion of 0.4 to 2.0 denier.
/d The dry heat yarn length difference ratio after dry heat treatment at 170°C for 5 minutes under load is 15% or more, 150 to 250 loops/m above the virtual yarn surface D defined in the text, as defined in the text An entangled yarn characterized in that it has 5 or less loops/m with a height of 0.35 mm or more from the virtual yarn surface A, and has a CF value of 50 or more. (2) A mixed fiber entangled yarn of two or more types of filaments,
Isophthalic acid and 2,2-bis{4-
It is made of polyester containing (2-hydroxyethoxy)phenyl}propane, has thick and thin unevenness in the longitudinal direction, and has a high shrinkage filament with a single fiber fineness of 3.5 to 6.0 deniers in the fine yarn part, and polyester, which has thick and thin unevenness in the longitudinal direction. 2 m of mixed fiber entangled yarn containing low shrinkage filaments with thick and thin unevenness in the direction and a single fiber fineness of 0.4 to 2.0 denier in the fine yarn portion.
The dry heat yarn length difference ratio after dry heat treatment at 170°C for 5 minutes under g/d load is 15% or more, the number of loops above the virtual yarn surface D defined in the text is 150 to 250/m, 5 loops with a height of 0.35 mm or more from the defined virtual yarn surface A
An intertwined yarn characterized by having a CF value of 50 or more and a CF value of 50 or more. (3) In the method for producing a mixed fiber entangled yarn, a highly shrinkable filament having a single fiber fineness of 3.5 to 6.0 deniers with substantially no thick and thin unevenness in the longitudinal direction and thick and thin unevenness in the longitudinal direction is used. The constituent yarns containing low shrinkage filaments with a single fiber fineness of 0.4 to 2.0 deniers are subjected to fluid turbulence treatment in a 3 to 9% overfeed state to be entangled, and then heat treated. A method for producing a mixed fiber entangled yarn characterized by: (4) In the method for producing a mixed fiber entangled yarn, a highly shrinkable filament having thick and thin unevenness in the longitudinal direction and a single fiber fineness of the thin yarn portion of 3.5 to 6.0 deniers and a thick and thin unevenness in the longitudinal direction are used. The constituent yarns containing low shrinkage filaments with a single fiber fineness of 0.4 to 2.0 denier are subjected to fluid turbulence treatment in a 3 to 9% overfeed state to entangle them, and then heat treated. A method for producing a mixed fiber entangled yarn, characterized in that: (5) Claim (3) or (4) characterized in that the high shrinkage filament is made of a polyester containing isophthalic acid and 2,2-bis{4-(2-hydroxyethoxy)phenyl}propane as copolymer components. ) The method for producing the mixed fiber entangled yarn.