JPS6285073A - Porous polyester spot yarn - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Technical Field> The present invention has the following features: This invention relates to a polyester mottled yarn that has micropores or microgrooves on the IN surface and in which unstretched portions are well dispersed.

<Prior Art> It has been known that when undrawn polyester yarn is drawn incompletely, mottled yarns are obtained. (Special Public Service 51-72
No. 07, JP-A-58-70711). Naturally, the more the mottling is emphasized, the stronger the characteristics such as texture will appear in the mottled thread, but if the mottling is emphasized, a low-oriented unstretched portion will remain, reducing the ease of handling and functionality. . For this reason, the current state of products using this yarn is that products with good characteristics are inevitably inferior in terms of functionality, and products with no problems in durability have even fewer characteristics. Of course, the above-mentioned special public service in 1972
-7207 discloses the idea of improving the functionality of mottled threads, but it is still far from satisfactory.Specifically, this publication describes the use of denier mottled fibers with an elongation of 35 to 70% and a rest. In the case of threads of this size, the -order yield strength is at most 1. Og/de, fresh water shrinkage rate of 15% or more, easy to handle.

The current situation is that it does not fully meet the recent needs for higher quality in terms of functionality.

Furthermore, in recent years, micropores or r! By expressing the 1IiI groove, water absorption
-Q) Special texture (JP-A-59-2049720@)
A method of imparting sharpness (Japanese Patent Application Laid-Open No. 130363/1983) has been proposed, and although these new woods have been well received in the market, they lack drapability and spun-like texture. This is a problem that needs to be resolved in terms of integrity.

<Object of the invention> The object of the present invention is to overcome the above-mentioned drawbacks, to provide a polyester mottled yarn that has improved mechanical properties and ease of handling, and can exhibit special effects such as water absorption, special texture, and sharpness. Our goal is to provide the following.

<Structure of the Invention> In order to achieve the above object, the present inventors conducted various studies and surprisingly found that in polyester mottled yarn, the mottling (neel part) is located in the special 41 dispersion pattern f. ,
1 No.b The condition (Subek l-1 regarding the cycle of spots and spots)
:] It has been found that when the strip 1'1 on the graph is stretched to a full W, the primary yield strength and elongation of the speckled yarn are significantly improved. We have found that by applying this fact to polyester that develops micropores or microgrooves on the fiber surface through alkali weight loss treatment, it is possible to obtain composite polynisder fibers with high functionality and high value-added effects.

That is, the present invention is a multifilament yarn containing single fibers that have thick and thin fibers and a denier ratio (denier ratio) of 2.0 or more, and the yarn is obtained from normal tesl. Subek [・Value at period 50 on the log graph (P50
) is less than 1/2 of the maximum value (Pmax), which results in a primary yield strength of 1.1 g/de or more and a breaking elongation of 33% or less, and the alkali weight loss treatment creates a fiber axis on the fiber surface. It is a polyester speckled yarn that has the latent property of developing micropores or microgrooves arranged in a direction.

In the present invention, the spectrograph refers to the Worcester spectrograph developed by Zellwega in Switzerland, and the measurement conditions are (a) normal test, (o) chart feed rate of 8 m/min, and (c) The chart range is set to 25%. This Worcester spectrograph can quickly analyze the content of plaques in parallel with a regular plaque test, and is said to be particularly useful for determining the pitch of plaques. (published by the Textile Machinery Society of Japan), pages 255 to 372.

In order to make the explanation concrete, examples of a conventional speckled yarn and a speckled spectrograph of the present invention are shown in FIGS.
The figure is a chart of mottled thread obtained by retesting Example 1 of Japanese Patent Publication No. 51-7207, and Figure 2 is a chart of mottled thread obtained by retesting Example 1 of JP-A-58-70711. Figure 3 is a chart of speckled threads obtained in Example 1 of the present invention, which will be described later.

When comparing FIGS. 1 and 2 (conventional) and FIG. 3 (present invention), there is a remarkable difference that can be said to be characteristic in P50/Pff1ax defined by the present invention.

In the former case, p50/Pmax is 1/2
(Figure 1...0.81, Figure 2...0.6
0) 1 stone is clearly less than 1772 Figure 3...
0.26), and it was found that this difference did not have a major effect on the handleability and mechanical properties of the speckled yarn. Although this theory has not yet been fully clarified,
In the case of Figures 1 and 2 (P 50 / P [naX >
1/'2>, the JJI part (thick part) with a long period is located in the north, while the part in Fig. 3 (P50/
P max≦1/2), the patchy part has a particularly long circumference of 111
This is thought to be due to the fact that 1 is more uniformly dispersed in a state that does not contain much 1.

Incidentally, the unloading curves of the spotted yarns shown in Figs. 1 to 3 are roughly shown in Figs. 4 to 6, and the following table summarizes each physical property from these.

Table 1 As is clear from the above table, P50/p m of spotted thread
It is an unprecedented new finding that by lowering the value of ax, the elongation, second yield strength, and 8WS of mottled threads can be significantly improved, regardless of whether they have large thick or thin mottles. It was also found that when this value is 1/2, the elongation is 33% or less, and the -order yield strength is 1.1 g/cle or more.

Such polyester mottled yarns allow for dispersive stretching, that is, not converging the stretching points at the yarn break, when drawing polyester undrawn (semi-)drawn yarn containing a micropore-forming agent that is removed by alkali reduction. It can be obtained by employing a drawing mode in which each single fiber is stretched independently. Specifically, (1) Do not apply concentrated stress to the yarn (ii) Do not intensively heat the yarn () @ Reduce the friction between fibers (C)...1 Reduce the amount of oil adhering ( C)...2
To explain more specifically how to change the physical properties of single fibers, it contains the above-mentioned micropore-forming agent,
And low-speed spun low-oriented polyester undrawn yarn,
It is necessary to stretch the film at a low magnification at which spots are sufficiently generated, and at a low magnification that causes spots to be scattered to a greater extent than in the past. For example, the spinning speed is preferably 20001rL/min, preferably 15001rL/llin or less, and the degree of orientation of -C is also 13X10' or less in terms of birefringence, preferably 10x
When it is 10-3 or less, a sufficient thick-to-thin ratio can be obtained.

It is also applied during spinning. , p, and u are preferably 0.7% or less, and if possible, it is desirable that the denier and cross-sectional shape of the single fibers be different. In this case, it is also effective to vary the cooling air effect during spinning. It is also useful to thoroughly squeeze it out before stretching. The straining tension must be at least 0.2 g/d of the supplied raw yarn, but if it is too strong, spots with poor dispersibility will be created in advance and will remain until the end, so this situation may occur. should be avoided, and for that purpose the tension should be reduced to 1. It is better to make it less than Og/d. Furthermore, during stretching, it is necessary to avoid concentrated heating as much as possible due to concentrated stress, and to ensure that the stretching points are aligned. For example, during stretching, it is preferable not to bend or otherwise sharply bend the material, as this would result in concentrated partial heating in a narrow area, which is not preferable. It is best to heat the entire yarn in a good range while keeping it as flat as possible, and the temperature should be set to 155° C., the glass transition temperature of the raw yarn, on top of the varnish. If this temperature is low, the dispersion effect of neck points being scattered over a long range during stretching is reduced.

Even if the yarn is preheated, the preheating temperature should not exceed this temperature by much. In other words, the stretching points are concentrated there. Although preheating the raw yarn is effective in preventing stretch wrap and increasing the drawability, it is not preferable in terms of unevenness, so preheating should not be too high, if at all. As for the draw ratio, it is necessary to maintain a sufficiently low draw ratio by drawing at a lower draw ratio than the natural draw ratio of the raw yarn. do so °
Coupled with the low orientation of the filaments described above, B causes thick uneven portions to be formed. Even if we improve the functionality by improving the dispersibility, it is meaningless if this mottled effect does not last for 1 minute, and for that purpose, thick Ⅱ with a thick to thin ratio (denier ratio) of 2.0 times or more is required.
It must contain a thick fiber portion that is more preferably 3.0 times or more thick than the m portion. The mottled yarn made in this way is
Furthermore, when a strong entanglement is added to this, the low orientation portion and the high orientation portion become entangled, further enhancing their complementary relationship. however,
Such an effect is usually achieved by a degree of entanglement that imparts binding properties to the yarn, and it is desirable to provide at least 40 or more entanglements, preferably 60 or more entanglements per m.

The polyester yarn used here is a yarn in which polyethylene terephthalate is the main repeating unit and a third component is added or copolymerized, and micropores arranged in the 8M axial direction on the fiber surface are created by alkali weight loss. Alternatively, it may be any fiber that exhibits fine grooves, and is not particularly limited. For example, m-fibers (Japanese Patent Laid-Open No. 57-11232), which are hollow fibers and exhibit water absorbing properties by communicating some of the micropores on the fiber surface to the hollow part, have streaky micropores.
II fiber with natural silk-like texture (Japanese Patent Application Laid-Open No. 59-204
No. 972), wX group that exhibits sharpness by having fine irregularities on the fiber surface (Japanese Patent Application Laid-open No. 130363S/1983)
It's something like.

<Operations and Effects of the Invention> Figure 7 (a) is a schematic diagram of polynisdel undrawn fiber, and when it is stretched at a ratio of 18, which is higher than its natural stretching ratio, (
As shown in (b), uniform thin drawn fibers are formed, but if they are stretched at a low magnification below the natural drawing ratio, as shown in (c), the completely stretched portions are completely stretched and the incompletely stretched portions are not fully stretched +b. ) becomes an incompletely drawn yarn. These incompletely stretched parts (heaps) are dyed deeply and have different physical properties, creating a unique texture effect! I can do it. This is the so-called T h
This has been known for a long time as ick and thin yarn. However, when such incomplete stretching is performed, the incompletely stretched portions will naturally still stretch if pulled, so the resulting yarn has the disadvantage of stretching in a sloppy manner. For example, Fig. 8) is an example of the conventional Th1ck and Th1n unloading curve made by incomplete stretching at a low magnification. It is usually quite large. Normally, the elongation of polynisdel filament yarn is about 25% at most, but when it is made into an incompletely drawn yarn by such low drawing ratio, its elongation becomes as high as 35% or more, compared to normal yarn. It is inevitable that it will be inferior in terms of handling and functionality, such as elongation and poor dimensional stability during use. Of course, if the stretching ratio is increased, this degree of elongation will decrease, but the characteristics of incomplete stretching will be lost and the effect will be lost. Therefore, a yarn having an incomplete stretching effect always has a fatal defect as a yarn with such high elongation. Furthermore, such an incompletely drawn yarn has a low primary yield point strength, and the yielding phenomenon is clear, and the elastic recovery limit is exceeded with a force smaller than J3, making the yarn even more difficult to handle.

The present invention overcomes these disadvantages and realizes a mottled thread that has sufficient incompletely drawn characteristics without increasing the elongation, and does not contain more than a certain percentage of long-period mottling.
Surprisingly, if the incompletely stretched portions are mixed in the degree of seed so that 0/P max becomes 1/2 or less (e)
We have discovered that incompletely drawn yarn can be produced with elongation comparable to that of fully drawn yarn. The reason for this is not well understood, but it is probably due to the incomplete stretching effect (as shown in the model diagram in Figure 9).
4 When the tit is mixed in, there will always be a fully stretched part (J...that is, not stretched) next to the incompletely stretched part (Koriyama) as shown in (G), so even if tension is applied ( It seems that this is to prevent J from stretching and +b〉 being stretched (
Note that in order to make this diagram easier to understand, the incompletely stretched portion is drawn shorter than it actually is, but in reality it may be a little better).

By the way, it has been proposed in the above-mentioned Japanese Patent Publication No. 7207/1988 to give the appearance a marbling appearance and to prevent yarn breakage during heat treatment by relatively dispersing the incompletely stretched portions in this way. There is.

However, such speckled threads still have a very high elongation, and this problem has not been solved at all. In the present invention, by greatly increasing the degree of dispersion and at the same time not including long-period irregularities beyond the proportion that constitutes J-, the elongation can be made comparable to fully drawn yarn while sufficiently eliminating incompletely drawn areas. We have achieved a new type of yarn (14j^) that could not be predicted by conventional wisdom.Of course, in this case, drawing (
Although it is possible to reduce the elongation by increasing the ratio or stretching the yarn further, the effect of incomplete stretching is also lost. In the case of the present invention, the thick to thin ratio is 2.
A major feature is that it is possible to achieve such a low elongation while including an incompletely stretched portion of 0 times or more, more preferably 3,048 times or more.

For example, polynisful polymer at 1200TrL/w
About in? When gta-spun, a completely drawn yarn with a normal diameter of about 1α of 30% is obtained at a draw ratio of about 3.0 times. In order to make this into an incompletely drawn yarn, the drawing ratio may be lowered.

However, if the stretching ratio is the same as before, as the stretching ratio is lowered as shown in FIG. 10, the degree of elongation will also increase accordingly. In order to produce an effective incompletely drawn yarn, the stretching ratio must be at least equal to or lower than the natural stretching ratio of the raw yarn (2.5 times in this case), and the degree of elongation becomes considerably large. Normally, the complete stretching ratio x 0.8 (8 ratio, that is, 3° OX O, 8 =
About 2.4 times the elongation is used, but this results in a high elongation as shown in ■ compared to the fully drawn yarn in FIG. Generally, the elongation of yarn that is easy to handle is about 20-33%, so this is too much and difficult to absorb. However, the yarn of the present invention has such a low (B rate) uneven stretching, but it is no different from a convex yarn as shown in b. With the above, 1i'!I<, and there is no clear yielding phenomenon, and the handleability is improved.

Furthermore, the same applies to spinning conductivity; the lower the spinning J* degree, the lower the degree of molecular orientation of the undrawn yarn, and therefore, the difference between the incompletely drawn part and the fully drawn part is the same when the undrawn yarn is unevenly drawn. It is very effective because it is small, but on the other hand, it is difficult to handle because the low orientation part is weak. For this reason, efforts have been made to prevent this embrittlement by increasing the spinning speed to increase the degree of molecular orientation and highly oriented and unstretched (Japanese Patent Application Laid-Open No. 150-718, etc.). For example, if a mottled yarn is made from a raw yarn that has been spun at a normal spinning speed of 1200 m/min, the embrittlement of the 11 pairs when the fabric is reduced by alkali is extremely severe, and the measured wet sm fastness values are as shown in Figure 11 (■). de1
~You can only get 2nd grade, which is completely unusable.

Conventionally, this embrittlement was prevented by increasing the spinning speed of the raw yarn and improving its orientation, as shown in (■), but on the other hand, when the spinning speed was increased in this way, the necessary draw ratio became prohibitive. As the fibers become smaller in size, as shown in Figure 10, the ratio (denier ratio) of the single fibers in the unevenly drawn portion and the fully drawn portion becomes smaller, and the effect as a uneven yarn is lost. . However, it is predicted from conventional common sense that if the spots are highly dispersed as in the present invention and the periodic spots are kept below a certain percentage, the yarn will be made of ordinary spun yarn and will be sufficiently resistant to alkali embrittlement, as shown in Figure 11 (■). You can get amazing results that are difficult to achieve. Although the reason for this is not well understood, it is probably because the fully drawn fibers wrap around and protect the incompletely drawn portions, as explained in the section regarding elongation.

In addition, with conventional mottled yarn, the difference in shrinkage rate between the incompletely stretched part and the fully stretched part causes the fabric to hang, resulting in the so-called buffing effect and unevenness of 1JI, but in the case of the present invention, the mottling is extremely dispersed. If one cycle is not included, no puff will appear and the fabric will be in a bulky state.

In addition, as the name suggests, conventional mottled threads produce slab-like mottling on the fabric, which has an appearance effect of IJ! It is not common except when used as textiles. In this regard, in the present invention, although the yarn contains low-orientation portions, it does not have very clear mottling, and only the texture effect due to the mixture of high- and low-orientation portions is noticeable, so that a very general material can be obtained.

As mentioned above, J3 according to the present invention has significantly improved handleability and mechanical properties, which were problems with conventional cut threads, and has a rough texture compared to conventional spotted threads. Since the thick and thin parts are significantly dispersed, a polyester fiber that is more spun-like, soft, and bulge can be obtained. Added value*44 can be obtained through the synergistic effect of function, luster, and texture due to the texture of the mottled yarn and the unique effects of the fiber surface. Originally, these polymers were
Polynisdel whose main repeating unit is poly(1-ethylene terephthalate)-1 is added or combined with a third component, and the third component is intensively dissolved or separated during alkali M reduction treatment. In this case, micropores or microscopic Fν1 are expressed on the surface of the fibers. Therefore, it must be a tI& pair that can withstand alkali weight loss. With conventional spotted thread, the strength decreases significantly due to alkali loss, so
Although combination with these polymers was not possible, it has become possible in the present invention, and the added value effect of high 1'' is very large.

The functions and effects of the present invention are summarized as shown in FIG. 14.

In the present invention, the primary yield strength is expressed by the strength at the first point (arrow in the figure) where the unloading curve bends with the smallest radius of curvature from the inflection point on the unloading curve, as shown in FIG. Then, the unloading curve itself was determined using a universal tensile tester (manufactured by Instron).
Crtr, tensile speed 100%/min, n = 10
The elongation is measured under the following conditions, and the elongation reading is determined at the breaking point (the point where the strength suddenly drops), as is usually done.

In addition, the natural drawing ratio is calculated by stretching the undrawn yarn.
It is expressed in the magnification of a point that suddenly rises from a flow state.

Furthermore, regarding the method of expressing the thick/fine ratio of a single fiber, normally a drawn mottled yarn is not completely divided into an undrawn part and a fully drawn part, but the ratio changes continuously between them. For that reason,
Even though it is simply called the thick-to-thin ratio, the average value can be any value depending on how far into the unstretched part it is counted. Therefore, in the present invention, what is the maximum thick 1111 ratio (denier ratio)?
It is expressed on the basis of whether the fibers of 12T are actually 3 twisted.

Example-1 100 parts of dimethyl terephthalate, 6 parts of ethylene glycol
0 parts and 0.06 parts of calcium acetate monohydrate were charged for transesterification, and the reaction was carried out for 4 hours under a nitrogen gas atmosphere. 14
The transesterification reaction was carried out while the methanol produced by T-evaporation from 0°C to 230°C was distilled out of the system. Subsequently (to the q product, 1 to 0.06 parts of phosphoric acid,
0.04 parts of antimony trioxide, 4 parts of 3-hydroxyethoxycarbonyl-benzenesulfone glycol solution, and 1.5 parts of 20% ethylene glycol slurry of titanium dioxide were added and transferred to a polymerization can. Next, the pressure was reduced to 760 ml l-1 CI over 1 hour, and at the same time the pressure was reduced from 230°C to 280°C over 1 hour and 30 minutes.
The temperature was increased by ℃. 1 mm l-1! Polymerization was carried out for a further 3 hours, for a total of 4 hours and 30 minutes, at a polymerization temperature of 280°C under reduced pressure of + or less, to obtain a polymer having an intrinsic viscosity of 0,640 and a softening point of 260°C.

This polymer was spun at 1300T'rL/min,
#1 refractive index = 7.5X 10'3, natural stretch ratio = 2
．． 5, 210Dc 3(iF
If the undrawn yarn was prepared, it was oiled with ○PU=0.4% and removed. Then, this undrawn yarn was coated with 0.4
Scrape it with a sharp edge while applying a tension of J/de, then preheat it with a pot roller at 50℃, and then transfer it to a heating plate at 160℃ with the surface as shown in graph 1. Stray 1~ without applying a steep angle
It was carefully stretched at a stretching ratio of 2.3 times while rubbing it thoroughly, and wound up as a QOD Q/3 (iFit speckled yarn).

The spectrograph and unloading curve of the obtained speckled yarn are as shown in FIGS. 3 and 6, respectively (physical properties are Nα3 in Table 1), and in practical terms, there was no difference in handling from normal yarn. Next, using this as the weave, we made 4114 m with twill structure, and 20%
Viera machinery was made by applying alkali weight reduction. The resulting fabric does not have any problems such as heat resistance or creep, and even with respect to embrittlement due to alkali depletion, it shows an amazing value of 3-4 grade IN2 fastness to warm pieces, and has functionality comparable to that of ordinary drawn yarn. showed that. Moreover, its texture has a warm and crisp feel due to the fact that it contains a large number of low-I8 drawn fibers, which are more than 3 times the thickness of the thick and thin fibers. This is the first time that we have been able to simultaneously achieve two contradictory properties: none of the drawbacks in handling and functionality that had been a problem in the past, and an extremely natural sensibility.

Moreover, there are micropores arranged in the fiber axis direction, and the water absorption rate is 75.
%was gotten. The water absorption rate before alkali treatment was 32%, which indicates that the water absorption effect is large.

Here, the water absorption rate was determined as follows. After drying the test cloth (soaking the sample in water for at least 30 minutes, dehydrate it for 5 minutes using a household electric washing machine dehydrator. Calculate with formula.

Small amount of sample after dehydration - Dry sample 1,000 water absorption resistance 111
0 *2 Drying test 1) 1 layer M In this case, tighten the edge with a tension of 0.3z
/ When lowered to de, the resulting yarn P50/Pma
x==0.45, elongation -31.0%, -order yield strength=i,':zg/dC. history opu 0.8
%, P50/Pmax = 0.58, elongation 91-43.2%, -order yield point -1,059/de, and wet friction robustness decreases to 2 due to embrittlement due to alkali reduction.
I got down to grade level.

Furthermore, when this ironing step was completely removed and the material was stretched while strongly sliding at a steep angle of play 1 in the drawing section, P50/Pmax = 0.72 and elongation was 49%.

-The next yield strength is -1, Og/de, and the resulting fabric has (
41 Many sink marks and hangings were observed, and the fabric was designed with a clearly visible ring pattern.

Example-2 100 parts of dimethyl prephthalate, 6 parts of ethylene glycol
0 part, calcium acetate 1 water temperature 0.06 part (dimethyl arephthalate, ILTO, 0 GGE 1%) was added to -r sprue a:ti, and nitrogen gas was added. ? Enkishita 411
, 'from 140℃ to 230℃ over i' (= 1
- Warm - While leaving the Meknol system where C is generated -
[I-switch exchange 1.6 was performed. Subsequently, 0.4 parts of 1-rimefyl phosphoric acid (2.1 in dimethyl arephthalate, ζ 0.554 Hill %) and 0.4 parts of the reaction product obtained were added.
Phosphate prepared by heating to 16 V for 60 minutes under total reflux at a temperature of 120°C in 25 parts of calcium acetate monohydrate (i/'2 ffit to 1-lymethyl phosphate) and 6.8 parts of ethylene glycol. Add 0.45 parts of calcium acetate monohydrate (s=i to helimethyl phosphate) to 7415 parts of a solution of acid diester calcium salt at room temperature.
．． Mixed transparent solution of phosphoric acid diester calcium salt and FitM calcium 7
．． 9 parts were added, followed by 0.04 part of antimony trioxide and transferred to polymerization pressure. Then for 1 hour 'C760
mm H! + to 1s+H (depressurize to 1, and at the same time 1"
The stomach was warmed from 230°C to 285°C over 1 hour and 30 minutes.

'I rrm H (under reduced pressure below I, polymerization temperature 285℃
Then, polymerization was further carried out for 31t, 'i for a total of 4 hours and 30 minutes until the intrinsic viscosity was 0. f340. 117 polymer with a softening point of 259°C
is. After the reaction was completed, the polymer was made into chips according to a conventional method. The internal precipitated fine particles in this chip contain 0.45
%Met.

This Borin was spun at 1300711/min, and the multilayer It1 rate was -8.2x 10-3. Natural stretch ratio -2,6
, 220D e/36 with glass transition temperature -66°C
Let F i l be the undrawn yarn, and this (ko○plJ=o, 4
% oiling and rolled up. Next, the undrawn yarn was rubbed with a sharp edge while applying a tension of 0.49/de [U + i], and then heated at 50°C.
After preheating with a hot roller, heat the plate at 160℃ with a surface similar to Graph 1~ without making a steep angle.
．． 5 (stretched at a stretching ratio of 8, 90De/36F
I rolled it up as an if patterned thread.

1 from the spectrograph and unloading curve of iFJ spotted yarn! The physical properties determined were as shown in Table 1, No. 4, and in practical terms, there was no difference in handling from normal yarn. Next, a Viera fabric was made by applying 1 d of alkali reduction. The resulting fabric does not have any problems such as cracking or creeping [Of course, it shows an amazing value of humidity resistance fastness of 3 to 4 in terms of embrittlement due to alkali reduction, and has the same functionality as ordinary drawn yarn. 3, the texture of which has a thick-to-thickness ratio of 311 and a large number of low-stretched 4JlK males with a thickness of 1-1, gives it a warm feel, a crisp feel, and excellent drapability. 6 in terms of texture, and it has two contradictory characteristics at the same time: it has no flaws in layout or function, which were problems in the past, and it has an extremely nauchal sensibility) - the sum is the beginning - (19 .

Similar yarn spinning was carried out for polyester using 111 yarn by repeating 111 yarns into ordinary poly 1 ethylene derenotare.
A comparison of the depth of color with the same product with a 10% alkali weight loss is as follows, and the product of the present invention clearly had better brightness.

Evaluation method: D 1anixBlac
k HG-FS (Mitsubishi Chemical Industries [J product) 15%owr
After staining at 130℃ for 60 minutes, sodium hydroxide 19/
The black-dyed cloth was washed by reduction in an aqueous solution containing n and hydrozulfite 1 g/Q at 70° C. for 20 minutes. The grittiness and depth of this black cloth were measured.

Glitter property> Glitter was evaluated by visually inspecting the dyed fabric under direct sunlight. The larger the evaluation number, the greater the grittiness.

Depth of color> As a measure of depth of color, depth alf (K/S) was used. This value is the spectral reflectance (R) of the sample cloth.
It was measured using a C-330 type self-recording spectrophotometer, and calculated from the Kubelka-Munk equation shown below. The larger this value is, the greater the deep color effect is.

(1-1'<> 2/S = (measurement wavelength 500TrLμ)
R Note that K represents an absorption coefficient and S represents a scattering coefficient.

[Brief explanation of drawings]

Figures 1 and 2 are spectrographs of the conventional polyester speckled yarn, Figure 3 is the spectrograph of the polyester speckled yarn of the present invention, and Figures 4 and 5 are unloading of the speckled yarn shown in Figures 1 and 2, respectively. The curve, Figure 6 is the unloading curve of the spotted yarn shown in Figure 3, and Figure 7
The figure is a model diagram of the occurrence of mottling due to incomplete stretching, Fig. 8 is an example of the difference in unloading curves of the conventional mottled thread and the mottled thread of the present invention, Fig. 9 is a structural model diagram of the mottled thread of the present invention, and Fig. 10 The figure is a relationship between drawing ratio and yarn elongation, and FIG. 11 is a relationship between spinning speed and embrittlement. Fig. 12 is a diagram illustrating the relationship between spinning speed and thick-to-thin ratio, Fig. 13 is a diagram illustrating the primary yield point of the Tsunaka curve, and Fig. 14 is a diagram illustrating the effect of the present invention.
It is a figure explaining an effect. In FIGS. 7 and 9, (field...completely extended part +b+
...This is an incompletely stretched portion. (No changes to the engraving ζ of the drawing) Figure 1 P2 Figure Z 345 10 20304050
100 Fig. 3 Fig. 4 Fig. 5 Fig. 6 Fig. 7 (A) (B) (C) Fig. 6 I Shin HaE Fig. 9 Fig. 10 Fig. 14 (75,) 'Appetizer) Light I\ 6 turns is less). (1) fsbc to A sopaha'IL-'F-,
Ito I Honhi, Nu) Kashinkyoku Rokupa Uke 3 (Kami Segoi 3) (Ru) I & Spinning] The thread L' is also alkaline daily, Ijishina, weak S. ;t＼) fIBWsrt い 6 壬) High school 1st year in Mukasho Haku [de Hodo Higashi 6: ``hEnshijFn'' 4 (Method) February 2nd, 1986[] :+r-:j', r ；'f-moon go゛■extend'self'ruly porous polynisple JM yarn representative name Okaki Butsu 4 parts

Claims (3)

[Claims] (1) A multifilament yarn containing single fibers that have thick and thin parts in the length direction and a ratio of thick to fine (denier ratio) of 2.0 or more, and is a spectrograph obtained in a normal test for the yarn. The above value (P50) at a period of 50 cm is less than 1/2 of the maximum value (Pmax), so that
It has a primary yield strength of 1.1 g/de or more, a breaking elongation of 33% or less, and has the latent property of developing micropores or microgrooves arranged in the fiber axis direction on the fiber surface through alkali weight loss treatment. Porous polyester mottled yarn. (2) The porous polyester mottled yarn according to claim (1), which has a boiling water shrinkage rate of 12% or less. (3) The porous polyester mottled yarn according to claim (1), wherein the degree of entanglement between single fibers is 40 strands/m or more.