JPS61146830A - Production of spun like two-layered structural feather 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 The present invention relates to a method for producing Nispan-like two-layer fuzzy yarn made of thermoplastic synthetic multifilament yarn. More specifically, the present invention relates to a method for producing a novel fluffed yarn, which imparts fluff to the multifilament yarn, thereby giving it a spun yarn-like appearance, feel, swelling, and sweat absorbency.

Conventionally, many methods have already been proposed for giving fluff to thermoplastic synthetic fiber multifilament yarn to give it the strength, fullness, appearance, feel, sweat absorbency, etc. of a spun yarn.

For example, when filament yarn is twisted by a twisting machine and a scraping body is brought into contact with the outer surface of the ballooning that occurs during the raising process, or when filament yarn is subjected to false twisting (crimping) processing, a scraping body is brought into contact with the heated part. There are methods such as cutting the filaments on the surface of the yarn to give it fluff. For example, in the case of the former method, although the equipment is simple, the raising speed is limited because the raising occurs during heating, making it impractical. The amount tends to fluctuate, and in extreme cases, troubles such as yarn breakage and winding around the rollers occur, making stable operability undesirable. In the latter case, high-speed processing similar to normal false twisting is possible at the stage of imparting fluff, and there are fewer problems such as tension fluctuations when imparting fluff than in the former case. Therefore, it has the advantage of being easy to provide fluff stably.

However, although the surface fibers are cut during heating, the inside of the yarn is also cut in substantially the same way, and the resulting fluffy yarn is an aggregate of short fibers, resulting in a significant decrease in strength. Therefore, if you try to obtain a large number of fluffs, the strength will decrease accordingly, which increases the frequency of yarn breakage (due to the frictional resistance of the false twister). The yarn obtained in this way has a structure similar to that of fleece taken out from the front roller during spinning, so in addition to having low strength, the fluff tends to move in the longitudinal direction of the yarn, resulting in large fluff growth and a nap-like structure. becomes. Therefore, since the yarn as it is cannot be used practically for weaving, knitting, etc., it is essential to add real twist to increase the strength and prevent the movement of fuzz, which results in restrictions on processing speed. Regarding this point, JP-A-51-112953 proposes that the core yarn is wound around another yarn in the false twisting region, and this wrapped yarn is raised, but in general, the wrapped yarn is Since it is easy to slip on the thread, you need to be careful in order to raise it evenly.

With conventional methods, it is extremely difficult to uniformly generate fuzz on the yarn surface, and in many cases it is essential to add actual twist. The weft yarns are strongly bound and bundled, resulting in reduced bulk and crimpability, making it impossible to obtain fluffy yarns. Further, additional twisting significantly reduces the production speed, resulting in extreme inefficiency. Therefore, at present, there is no method for stably imparting fluff to substantially untwisted bulky crimped yarn.

Therefore, the object of the present invention is to provide a method for producing a spunlike-like fluffed yarn that has sufficient strength, is uniform and has sufficient fluff, eliminates the concern of neps, and has excellent yarn handling properties. Our goal is to provide the following.

Furthermore, another object of the present invention is to omit the twisting step and to even out fluff even at high-speed processing, particularly at processing speeds of 200 m/'' or more, without substantially deteriorating the physical properties of the yarn itself.
Another object of the present invention is to provide a method for producing spunlike-like fluffy yarn that can be applied to the yarn surface in a stable amount.

As a result of intensive research aimed at achieving the above object, the inventors of the present invention believe that from the perspective of realizing high-speed processing, it is most advantageous to adopt false twisting, which makes this possible. In addition to incorporating this process, from the point of view of raw yarn use, extremely satisfactory results were obtained when cutting and raising the filament mainly in the wrapped portion after forming a stable two-layer wrapped yarn with an interlaced portion between the eyebrows. The present invention was achieved by investigating the following.

According to the present invention, two or more types of filament yarns that can be drawn at least 1.2 times or more and have an elongation of at least 80% or more are mixed and intertwined with each other to produce at least 20% or more.
The yarn is simultaneously stretched, false-twisted, and crimped at a stretching ratio of at least 1.2 times or more with an entanglement of at least 1.2 times the number of threads/M. A method for producing a characteristic spun-like two-layer fuzzy yarn is provided.

Furthermore, regarding this, the present invention requires a raised raw yarn in order to simultaneously satisfy the requirements of raising amount, raising stability, uniformity of fluff length, and maintaining practical strength of the fluffed yarn as a whole. This technology is based on the technical idea that it is essential to cut the filaments in the wrapped portion of a two-layer yarn with a uniform wrapping structure, and to create entanglement between the filaments between the core yarn and the wrapped yarn. .

To explain this point in more detail, generally speaking, when two or more types of yarn with different elongations are combined, fed to a supply roller, and twisted with a false twisting spindle, the yarn with a lower elongation is difficult to stretch. , which constitutes the core of the yarn, and has a high elongation is easy to stretch, so it is twisted so as to surround the outer layer of the yarn.

After heat-setting this twisted yarn state, M twisting yields a two-layered crimped yarn in which yarns with lower elongation act as a core and yarns with higher elongation surround the core in an alternately twisted manner. .

Incidentally, such machining is generally performed at a low speed of 100 m/mix or less, but in this case, if a particularly uniform winding structure is to be obtained, careful machining is required at a low speed of 60 m/mix or less.

The reason why such a low speed has to be adopted is that the yarn structure is unique in that it is an alternately twisted and wound yarn, which has the disadvantage that the yarn structure stability is extremely poor during the false twisting (crimping) process and the weaving process. This is because, especially in the false twisting process, the yarn structure changes so sensitively that it cannot even be imagined from the common sense of ordinary woolly processing, and at a processing speed of 6 omi or less, the yarn structure changes around the core yarn 1 as shown in Figure 1. A uniform 2-layer structure in which the winding threads are alternately twisted can also be obtained near 100m/+++x, although the winding is partially incomplete as shown in Figure 2, a 2-layer structure can be obtained. However, 150-250 m1
mm, the winding structure as shown in Figure 6 becomes only a part of the winding structure, and when the length exceeds 500m1m, the JP Zenzuke structure is no longer obtained, and the winding structure becomes completely two threads as shown in Figure 4. Only separated crimped threads are obtained.

With the change from a wrapped two-layer structure to a woolly crimped yarn structure due to the increase in processing speed, when these are raised, the original wrapped structure is increasingly destroyed, and the woven or knitted fabric obtained from the raised yarn becomes spun-like. This will significantly reduce the appearance and fit. Moreover, in the part without the wrapping structure, the yarn corresponding to the outer layer yarn becomes slack by the amount of yarn of the inner and outer layer yarn, which causes neps to occur at the winding part of the false twisting process and in the weaving process. As a result, process problems lead to serious problems such as a significant deterioration in the quality of the product.

In this regard, the present inventors have developed a winding structure that prevents destruction of the winding structure during high-speed processing, a permanently stabilized and uniform winding structure, and a winding structure that is not destroyed even by raising treatment. It was confirmed that in order to obtain this, it was necessary to use a cross-wire interlacing method instead of using two threads of gold thread. however,
Although this method of mixing and entangling fibers is a rather negative factor from the viewpoint of forming a two-layer structure, it lies between preventing the destruction of the wrapping structure during processing and forming a two-layer structure. The trade-off is that by selecting the elongation of the two yarns and combining it with drawing and false twisting as a processing method, the drawbacks of using interlacing and entangling methods can be overcome, and as a result, the napping is done in a winding state close to the ideal. In other words, it is possible to do this.

The present invention is a blend of yarns (filament yarns) with different elongations,
The process of intertwining, the process of heating the intertwined yarn to form a two-layer twisted yarn structure, the process of untwisting it to form a two-layer structure of alternately twisted and wound yarns, and the process of forming the two-layer structure (during false twisting) of the filaments. It consists of a cutting and raising process.

This process is shown in Figure 5, where two
The yarn threads 3, 3 are combined by a guide 4, then passed through a tension adjustment g1g device 5 and a feed roller 6 to T! A#! , and is supplied to an air jet nozzle 7 for interlacing, where it is made into an interlaced yarn having 20 or more interlacing points. Next, this intertwined yarn is supplied to the drawing false twisting zone by a first delivery roller 8, passes through a heater 9 and a false twisting tool 1o that also has a napping function, and is taken off by a second delivery roller 11.
It is rolled up as cheese 12'. In the above example, a circumferential friction false-twisting tool was shown as the false-twisting tool, but with the second false-twisting tool, high-speed processing of 200 m/m or more is easier than with a spindle-type false-twisting tool. In the case of yarn false twisting, it has been found that unlike the front spindle, the wound yarn tends to peel off at the final disk (pA twist point). In this regard, in the present invention, even if a frictional false twister is employed, there is no concern about the peeling of the folds (a uniform two-layer fluffed yarn can be obtained at high speeds).

According to the present invention, the interlacing treatment applied to the raw yarn, together with the characteristics of the raw yarn used, makes it possible to obtain a two-layered yarn that is stable against raising. However, when raw yarns having different elongations are simply intertwined and subjected to false twisting, an undesirable influence is exerted on the heating process of false twisting. In other words, intertwining the two types of raw yarns to be supplied will result in the yarns being mixed together, and even if raw yarns with different elongations are simply supplied, the core and It is not possible to obtain a two-layer structure yarn constituting the outer layer. The conventionally done doubling,
In false twisting, there was no force that inhibited the mutual elongation deformation, so if there was a 50% difference in elongation, a two-wrap structure would result; however, as in the present invention, entanglement between the two yarns is In this case, even if yarns with different elongations are simply twisted together, a 2@ structure will not be formed due to deformation inhibition due to entanglement.

In order to solve this problem and take advantage of the effects of the entanglement treatment, we conducted various studies on the deformation behavior of the false twist heating section, and as a result, it was found that the elongation of the raw yarn used makes a large contribution. The relationship between the yarn characteristics to be supplied and the yarn deformation process in the false twist heating section will be explained below.

Two or more raw yarns with different elongations are intertwined and then heated with a false twisting tool to obtain a wrapped two-layer twisted yarn structure.The yarn with one higher elongation is drawn and false twisted. At the same time, it is necessary that the elongation difference between the yarns to be combined be 80% or more.

Since the intertwined yarn is made up of two yarns with different elongations that are intertwined, it is difficult to form a 2'-layer structure even if the yarn is heated as is. However, this problem can be solved by supplying a yarn that can be drawn and false-twisted to the yarn with lower elongation. In other words, by false-twisting and heating at the same time as drawing, yarns with different elongation properties that have been unified by the entangling process can be divided into a group of filaments with high tension due to the difference in elongation characteristics of both yarns in response to the false-twisting tension. The fibers of both groups are separated again into a filament group with low tension and become a yarn partially intertwined in the length direction, which is twisted by a false twisting device.

From this point of view, it is essential that the filament yarn with lower elongation can be drawn and false-twisted at least 1.2 times or more, but the most favorable results can be obtained when the draw ratio is 1.4 times or more. It will be done. Furthermore, at this time, in order to obtain a wrapped two-layer twisted yarn structure, the magnitude of the difference in elongation between the two yarns is relevant.
A larger difference in elongation is required than conventional wisdom. In other words, if there is no entanglement, the difference in elongation between the two yarns is about 50%, which is enough to form a two-layer structure, but if the elongation is
A difference in elongation of 150% or more is required, and more preferable results can be obtained if the difference in elongation is 150% or more.

In this way, by providing a large elongation difference between the two yarns, and in combination with the separation of the mixed yarn into two layers due to drawing, the two layers can withstand the raising treatment in the heated region for the first time. A twisted yarn structure is obtained, and as a result, by untwisting the heated yarn, a two-layer structured yarn with alternating twist windings is obtained.

Next, to explain the occurrence of the 2@ structure in the component yarns during g-twisting, when the speed is increased in simple elongation differential yarns and false twisting, even though the heating section has a two-layer twisted yarn structure. The reason why the 2@alternately twisted and untwisted structure was not achieved during untwisting was due to the ballooning of the yarn at the untwisting point and the centrifugal force acting on the core yarn and outer yarn with different magnitudes, which caused the structure to be generated. This is because the structure may have been destroyed due to interference, abrasion, ironing, etc., caused by a false twisting device such as a spindle or a friction false twisting disk.

By the way, in the present invention, since partial entanglement is imparted between the yarn forming the core and the yarn forming the outer layer at the raw yarn stage, the above-mentioned untwisting ballooning and false twisting apparatus Because it has a convergence force that resists abrasion and ironing, it is successfully untwisted into a two-layer alternately twisted and wound yarn. In order to obtain such a processed yarn, the number of entanglements added to the raw yarn is 20/
M or more is required, 30 pieces/M or more (upper limit is 100
It is more preferable if the number of particles per M) is more preferable. The degree of confounding is measured as follows.

In other words, when the entangled raw yarn is floated on water in a container, the non-entangled part opens to several times the thickness, while the intertwined point does not open. Read numbers visually.

Incidentally, as a method seemingly similar to the present invention, the above-mentioned Japanese Patent Application Laid-open No. 51
Publication No. 112953 describes that two yarns with different elongation moduli are aligned, mixed or twisted, and then subjected to simultaneous stretching and false twisting, and fluffed in a heating region. Example IK of the same publication shows an example in which yarns with elongations of iso% and 80% (difference in elongation of 70 inches) are aligned and simultaneously stretched and false-twisted at a draw ratio of 1.5. But in this example,
Both the fact that they are aligned and the difference in elongation between the yarns is 70%, which lack the essential requirements of the present invention. Furthermore, although it has been shown that the yarn is a single mixed fiber, in the simultaneous stretching and false twisting processing under a draw ratio of 1.2 times or more with an elongation difference of 80% or more, as referred to in the present invention, Confounding degree at least 20
It is not taught that the above-mentioned actions and effects can be obtained when the number/M is set.

As mentioned above, the twining process of the raw yarn is a process for forming a two-layer structure.
is negative, but this can be covered by using yarn that can be drawn and false-twisted, and by combining yarns with a larger difference in elongation. As a result, by synergistic use of the interlacing treatment and the elongation characteristics of the raw yarn, it is possible to obtain a composite yarn even for napping.

In the present invention, as a combination of filament yarns of 2M or more with different elongations, the yarn with the lower elongation has a smaller amount (both 1.
Use a yarn that can be drawn and false-twisted twice or more, and a yarn with a high elongation that can be further elongated by 80% or more compared to when the yarn is removed. Most preferably, the less elongated yarn is 100%
Partially oriented filament yarn with an elongation of 1.4 times or more and a draw ratio of 1.4 times or more, and 2
A combination with more than 50% undrawn yarn is used.

Furthermore, in the present invention, "filament yarn" means a thermoplastic synthetic fiber filament yarn, and in particular, polyethylene terephthalate is the main target, but a yarn copolymerized with a third component in a proportion of 15 mol% or less may also be used. do not have. The polynistil may also contain additives such as matting agents, colorants, flame retardants, and the like.

Further, although the undrawn yarn and the partially oriented yarn may have the same filament cross-sectional shape, content of matting agent, presence or absence of coloring agent, etc., at least any of these may be made different.

The denier of the undrawn yarn and partially oriented yarn should be selected depending on the application, but in general, it is best to set the wrapped yarn ≧ the core yarn in the total yarn, and the denier of the undrawn yarn and partially oriented yarn should be selected according to the application.
, the latter is particularly preferably 50 to 150 de.

In addition, considering the draw ratio during processing, the single fiber denier after processing should be a combination where the single fiber denier is ≦ the core yarn. The single fiber denier is particularly preferably 3 de or more. By combining the yarns as described above, it is possible to obtain a woven or knitted fabric that has bulk, a soft feel on the surface, elasticity, and resilience.

Further, as the air injection nozzle, a generally used nozzle for interlace processing is suitable, and a Taslan nozzle can also be applied. Further, after the interlacing process, it may be rolled up or not (it may be subsequently false-twisted or not).

The false twisting device may be a spindle wound around a twist bin, a fluid air false twisting nozzle, or an internal or external friction false twisting device. Similarly, the false twisting and crimp processing conditions may be appropriately selected within the conventionally adopted range.

On the other hand, examples of filament cutting and raising tools include, for example, Japanese Patent Publication No. 19743/1974, Japanese Patent Publication No. 58379/1982, Japanese Patent Publication No. 7891/1989, Japanese Patent Publication No. 319/1986.
A rotating or fixed rough surface body or a cutting blade as shown in Japanese Patent No. 42 or the like is advantageously used. Such a cutting and raising tool is usually preferably provided in a cooling zone between the heater outlet end of the false twisting and crimp machine and the false twisting tool.

Of course, according to the present invention, not only the case where a cutting and raising tool and a false twisting tool are provided individually, but also a false twisting tool 10 having a cutting and raising function as shown in FIG. 5 can be suitably employed. FIG. 6 is a front view of such a temporary binding tool. Specifically, three or more shafts each having a plurality of disc friction members attached thereto are arranged so that the discs of each shaft partially overlap and intersect with each other. , which are arranged parallel to each other so as to be parallel to each other, with a plurality of disc friction bodies consisting of a twisting friction body that falsely twists the yarn, and a napping friction body that gives fluff to the yarn. .

In the figure, three bearings 14, 15 and 16 are provided on the bracket 13 at the apex positions of an approximately equilateral triangle, and the bearings 14,
The shafts 18 and 19 are rotatably supported via 15 and 16 bends.

Boo at the bottom end of axis 17! J17a, wheels 18a, 18b, and drive wheels 20 are formed on the lower end of the shaft 18, and a foot J19a is formed on the lower end of the shaft 19, or is fixed to the shaft. Similarly, connect a power transmission member such as the timing belt 21 between the pulleys 17a and 18b.
A transmission member such as a timing belt 22 is stretched between j18a and j19a.

When the drive wheel 20 is pressed by a drive means such as the belt 23,
From the drive shaft 20 to the shaft 18, further a pulley 18a,
The rotational force is transmitted from the timing belt 18b to the shaft 1Z19 via the timing belt 21.22 and the pulleys 17a and i9a, respectively, and the shafts 5.6 and 7 are rotated in the same direction.

24, 25.26.2 28.29.30.31 and 3
2 is a disk friction body fixed to the shaft 17, 18, 19, and these disk friction bodies consist of a twisting friction body that falsely twists the yarn and a napping friction body that raises the yarn to give it fluff. In the figure, as an example, 24, 28, 29, 30, 31 and 32 are twisted friction bodies without a raising effect, and 25° 26 and 27 are raised friction bodies.

The twisted friction body is made of a conventionally known high-friction material such as polyurethane or a wear-resistant material such as ceramic or ceramic-coated metal, and its surface roughness is 1 to 8S.
is appropriate. By setting the surface roughness to 1 to 8S, it is possible to obtain almost the same twisting effect as a disk friction body made of a high friction material such as polyurethane, and to have a much longer life than a polyurethane friction body. However, if the surface roughness exceeds 88, the twisting of the yarn will slip on the thread contacting surface of the friction body, and the required high level of twisting will become especially squeaky.

As the raised friction body, a rough disk friction body such as a rough disk formed or coated with aluminum oxide particles or a rough disk coated with diamond particles is used. The surface roughness of the raised friction body should be appropriate depending on the thickness of the yarn to be processed, the thickness of the single fiber, and the structure of the yarn, but it should be equivalent to 100 to 3000 meshes when expressed in terms of average particle size. is appropriate, and a more preferable effect can be obtained when the number of meshes is 300 to 1000.

If particles coarser than 100 mesh are used, the twist applied by the twisting friction body is inhibited by the rough raised friction body surface, making it impossible to obtain the required level of false twist, and also causing yarn breakage. It becomes easier. Furthermore, if fine particles exceeding 3,000 meshes are used, the surface becomes smooth and a sufficient napping effect cannot be obtained.

3 A plurality of disc friction bodies fixed to the wooden shaft 1 Otsu 18 and 19 are composed of a twisting friction body that applies false twist to the yarn, and a raised friction body that gives fluff to the yarn, respectively. It is made to have an independent function regarding napping. By dividing the functions of the disc friction body into a twisting friction body that exclusively performs twisting and a raised rough surface body that exclusively performs raising, it is possible to simultaneously achieve the required high level of false twisting and a large number of short fluffs. In other words, since a high level of twist is applied by the twisting friction body, the fiber bundles are temporarily strongly focused by the twisting, and in this state, the fiber bundles can be rubbed and raised by the raised tracheal body. Short fluffs can be obtained.Furthermore, even if the surface of the napped friction body is loosened until a sufficient number of fluffs is obtained, the number of false twists does not decrease at all, so the surface roughness required to create a large number of fluffs can be reduced. The required number of raised friction bodies can be attached depending on the desired number of fluffs.

The processed yarn thus produced has sufficiently high electrical properties (usually due to heat setting during false twisting) due to the high level of false twisting, and has many short fluffs.

In the present invention, the plurality of disc friction bodies may be formed by appropriately arranging the twisting friction bodies and the raised rough surface bodies, but the friction body that comes into sliding contact last during processing of the yarn is a twisted friction body that does not have a raising effect. Preferably, it is a friction body.

In the friction body where the yarn finally comes into sliding contact, the yarn is bundled by false twist at the part where the yarn is pressed against the surface of the friction body, but the M twist of the yarn is concentrated at the part where the yarn is about to leave the friction body surface. The thread begins to lose its cohesiveness, and due to additional crimp, the constituent single fibers of the thread break apart and swell. If the last frictional body that comes into sliding contact at this time is a brushed tracheal surface, the moment the thread is about to leave that surface, the single fibers that are about to disperse and swell will be caught by the tracheal particles and become long. This will result in fuzz. Moreover, if the degree of damage is too high, it may cause thread breakage. Therefore, it is preferable that the friction body with which the yarn comes into sliding contact last is a twisted friction body that does not have a raising effect. On the other hand, it is preferable that the friction body with which the yarn comes into sliding contact first is also a twisted friction body for another reason.

That is, when the first friction body is a raised friction body, it is necessary to carefully set the position of the bait thread guide so that the contact length is as determined. If this happens, in a multi-spindle production machine, threads with different numbers of fuzz will be produced between the spindles. In order to avoid this problem, if the first friction body is a twisted friction body, then by adjusting the mechanical arrangement of the device, the yarn can be brought into contact with the raised friction body attached to the second and subsequent friction bodies at a predetermined contact length. It becomes possible to do so.

Furthermore, in terms of the diameter relationship between the raised friction body and the twisted friction body, it is appropriate that the diameter of the bait be equal to or less than the diameter of the latter. The brushed friction body is selected and installed depending on the thickness of the yarn to be processed, the thickness of the constituent single fibers, the structure of the yarn, and the number of fuzz to be obtained. When a plate is used, the twisting friction plate may obstruct the retroactivity of the twisted twist, and the number of retroactive twists to a part of the heater to be twisted may be reduced by one. This requires particular attention when using a raised friction body with a particle size coarser than 400 mesh. In order to avoid this problem, it is possible to solve the problem by setting the surface speed of the twisted friction body to a higher speed. This could cause problems.On the other hand, books -
According to the invention, by making the diameter of the raised friction body one diameter or less of the twisted friction body, the sliding contact angle of the thread on the rough surface is reduced.
The twisting resistance of the yarn is reduced accordingly, the twisting is no longer inhibited, and the above-mentioned problem is solved.

In addition, the thickness T of the twisted friction disk is generally 5 to 10 mm,
And the radius of curvature R of the circular arc portion of the end face is ¥4 to 1 of the thickness T.
It is appropriate to double the amount.

Incidentally, it is preferable that the upper and lower surfaces of the friction disk and the circular arc portion of the end surface are smoothly connected by a radius of curvature r that is sufficiently smaller than the radius of curvature R.

In this case, it is preferable that the diameter of the friction disk is usually in the range of 40 to 5,511 mm.

Furthermore, the thickness T of the brushed friction disk is generally 5 to 10B,
And the radius of curvature R' of the circular arc portion of the end face is 3 to 3 of the thickness T'.
It is better to set it to 1x. Further, it is preferable that the upper and lower surfaces of the friction disk and the circular arc portion of the end surface are smoothly connected by a radius of curvature r' that is sufficiently smaller than the radius of curvature R'.

The friction body disks constructed in this way are attached to shafts 17, 18, .
19 so that the friction disks of each shaft partially overlap and cross each other. Here, the gap t between adjacent friction disks is
is usually preferably maintained at 1.0n or less. If it exceeds this, the running of the thread becomes unstable, and if it is less than 0.3 length, threading becomes difficult.

On the other hand, the number of twisting friction bodies is greater than the number of raised friction bodies.If the number of twisting friction bodies is small, it becomes difficult to get the necessary twist, and furthermore, the raised friction slightly inhibits twisting. The twisting of the yarn is lost and the false twist level tends to drop.Such a problem can be solved by increasing the number of twisting friction bodies to a greater number than the number of napping friction bodies.Furthermore, the number of twisting friction bodies can be increased. It is preferable that the number of friction members is at least twice the number of brushed friction members.

Now, in the false twisting and raising device configured as above,
The yarn Y slides sequentially from the yarn guide 2'3 through the yarn path formed by overlapping and intersecting friction disks to reach the yarn guide 34. Here, while making the thickness T of the twisted friction disk sufficiently thick,
By making the radius of curvature R of the end face sufficiently large to 4 to 1 times the thickness T, the rotational speed at the point where the yarn Y reaches and leaves the friction disk, and the maximum rotational speed of the yarn Y. The difference between the rotational speed of the twisting point and the twisting point is made small, making it possible to twist almost uniformly in the yarn path direction.

In addition, by making the twisting friction disk thicker, the twisting portion is sufficiently long, so that it can overcome the twisting retrospectively inhibiting effect caused by the raised friction body.
Uniform and high-level twisting can be performed, and processed yarns that are extremely uniform and have high electrical conductivity can be obtained. Note that if the thickness of the twisting friction disk is too thin, the twisting will not be carried out sufficiently, and if it is too thick, resistance will occur in the direction of the yarn path and yarn breakage will occur easily. Furthermore, if the radius of curvature (R) of the end surface becomes too large, the end surface approaches a cylindrical cross section, and the twisting of the yarn is mainly performed at its arrival and departure points, thus overcoming the backward twisting inhibition of the raised friction body and twisting. This results in a decrease in the electrical properties of the resulting processed yarn, and the fluff becomes long and untidy. Furthermore, if R is too small, the speed difference between the arrival point of the yarn and the outermost part of the arcuate cross section will be large, and a twisted portion will likely occur.

Furthermore, taking the above points into consideration, and assuming that a sufficiently high level of twisting can be obtained, the thickness of the disk of the raised friction body, T.
By making ′ sufficiently thick, not only can a sufficient amount of fluff be produced, but also the radius of curvature R′ of the end face can be increased.
By setting T' to 3 to 1 times the thickness T', it is possible to optimize the stress concentration on the surface in contact with the yarn collection, so it is possible to achieve a sufficient raising effect and avoid problems such as yarn breakage. is possible. In addition, if the thickness T) of the raised friction body is too thick, it will inhibit the retroactivity of the twist imparted by the twisting friction body, reduce the electrical properties of the processed yarn, and cause the fluff to become long. .

Furthermore, the resistance in the direction of the yarn path increases and yarn breakage is likely to occur. On the other hand, if it is too thin, a sufficient napping effect cannot be obtained. In addition, if the radius of curvature of the end face is too large, the concentration of two forces on the surface in contact with the yarn collection will be too small, and a sufficient fluffing effect will not be obtained, and conversely, R'
When is too small, the stress concentration on the surface in contact with the yarn pool is too large, making it easy to cause yarn breakage.

The relationship between the yarn use or structure (Fig. 8) of the thus obtained spunlike-like 2@structure fuzzy yarn and its corresponding characteristics and functions can be explained as follows.

(Shu core thread; low elongation...curved...the probability of napping is extremely small, so it has the effect of maintaining the strength of the entire fuzzy thread (sashimi thread; (1) high elongation...core It's a thread covering (
i) Fuzz: Increased softness and spun-like texture (110 alternating twisted yarn winding: imparting a span-like texture (C) Partial interlacing of core yarn and wrapped yarn (1) Stabilizing effect of winding structure (Improvement of weaving properties) (11)
Stabilization of fluff (prevention of pilling) (iii) Stabilization of the winding structure itself (prevention of neps) In addition, in order to improve the weavability of composite fluff yarn obtained by elongation difference yarn and false twisting, processed yarn is used. It is also possible to perform the interlacing process by passing the yarn through an air injection nozzle, but in that case, the yarn structure is once destroyed by turbulent air, and the core fibers are pulled out and intertwined with the outer layer fibers. The 2IIi structure was destroyed, resulting in a tangled yarn of crimped yarns with different yarn lengths, as shown in Figure 7, and in exchange for improved weavability, the texture was fluffier than that of conventional woolly processed yarns. This leads to another problem: it goes beyond the texture of the object. On the other hand, the fluffy yarn of the present invention is a fluffy yarn with a 2@wrap structure that is partially entwined as shown in Figure 8, so it has improved weavability and is different from the conventional woolly crimped yarn. It has the advantage of producing a woven or knitted fabric with a spun-like texture.

As described above, according to the present invention, even when false-twisting is performed at high speed, a uniform and stable 2@wound structured yarn can be obtained, and there is no fear of yarn breakage, and short fuzz can be evenly twisted. Moreover, it can be erected at high density. Moreover, not only the weavability of the obtained fluffy yarn can be improved, but also the resulting woven or knitted fabric can have a well-balanced, spun-like feel.

70% polyester filament yarn (9Sde
/24fils) and speed 2500 m/wig (7)
Spun t'l (:+t' elongation 150% black spun-dyed polyester filament yarn (180de/48 filB)
After aligning them, they were subjected to interlacing treatment, stretching, false twisting, and raising processing in the steps shown in Fig. 5.

In other words, the second thread is fed to the feed roller 6, and the second thread is fed to the feed roller 6.
Overfeed rate 0.5% with Liberi roller 8
, interlace processing was performed with an interlace nozzle 7 at a compressed air pressure of 4 Ky/di, and 60 entanglements/m were applied,
Subsequently, the yarn is supplied to the false twisting zone via the rollers 8, and the stretching ratio is 1.284 times, the number of false twists is 2550 T/m, the heater temperature is 200'e, and the yarn speed is 250 m/i, that is, the speed of the second twist IJ roller 11. Stretched and false-twisted. The false twisting tool 1o shown in FIG. 6 and shown in Experimental Taka 1 in Table 1 below was used.

When the processed yarn thus obtained was observed under a microscope, it was found to be a uniformly alternately twisted two-layer fluffed yarn as shown in Figure 8, with a core (elongation of 30%) and outer layer yarns. It was a fluff-like textured yarn with partial interlacing (rl, ke/m) in which black and white filaments were interwoven with each other between the threads. Furthermore, when this yarn was used for weaving, there were no problems such as generation of neps during the weaving process, and the resulting fabric had a spun-like texture.

Furthermore, Table 1 shows the results of false twisting and raising while changing the conditions of the false twisting tool 10 in various ways.

Comparative Example 1 Stretched polyester filament yarn with elongation of 27 inches (75 d
e/L 5 ff1s) and a polyester filament yarn (115 de/36 fils) with an elongation of 120 inches spun at a spinning speed of 3,500 m/foot, and
The interlacing process and false twist raising process were performed in the process shown in the figure.

Here, the entangling treatment was performed in the same manner as in Example 1, and the false twisting conditions were as follows: Since the drawn yarn with an elongation of 27 inches cannot be drawn and false twisted,
Overfeed rate 3, number of twists 2400 T0n,
False twist raising was performed at a heater temperature of 220° C. and a yarn speed of 200 tn/m.

The fluff-like textured yarn obtained in this way is as shown in Figure 10, and although the elongation difference satisfies the requirements of the present invention, since the yarn that can be drawn and false-twisted is not used, the degree of the two-layer structure is The yarn had a poor texture and did not have an alternate twist structure. Also,
When weaving using this yarn, there were no problems during the weaving process, but the fabric lacked a spun-like texture and was not much different from ordinary woolly yarn fabric.

Comparative Example 2 Polyester filament yarn with an elongation of 7° (96 de/24 ft 1 g) spun at a spinning speed of 4500 B/-
) and elongation of 130 when spun at a spinning speed of 3000 m/”
% polyester filament yarn (180de/48
fils) were aligned and subjected to intertwining treatment and false twist raising processing in the process shown in FIG.

The processing conditions were the same as in Example 1 for both interlacing and false twisting.

The processed yarn thus obtained was as shown in Figure 9, and consisted of a yarn constituting the core and a yarn constituting the outer layer, but the difference in elongation between the yarns was 60. %, which is less than the lower limit of 80 inches according to the present invention, so an alternate twist-wound structure could hardly be formed. In addition, the place woven using this thread,
Although there were almost no problems during the weaving process, the fabric lacked the feel of two-span fabrics and was not much different from ordinary woolly yarn fabrics.

Example 2 A polyester filament yarn with an elongation of 112 inches (115 de/
24 fils) and a black spun-dyed polyester filament yarn (220 de/72 fitg) with an elongation of 350% obtained by spinning at a spinning speed of 1500°/- (220 de/72 fit) were interlaced in the process shown in Figure 5. Treatment and stretching and false twisting were performed.

At that time, an interlacing nozzle was used to apply interlacing of -S units/m at an overfeed rate of 0.5% and a compressed air pressure of 4 KP/m, followed by a stretching ratio of 155 times and a number of false twists of 2500T.
/m, a heater temperature of 180° C., and a yarn speed of 350 m/m.

The processed yarn obtained in this way has a fluffy yarn with a uniform alternately twisted two-layer structure as shown in FIG.
9%) and the yarn constituting the outer layer portion (entanglement points t, ht, ke/M). Also,
When weaving using this yarn, there were no problems such as generation of neps during the weaving process, and the resulting fabric had a spun-like and soft texture.

150% polyester filament yarn (140as
/24 fils) and a polynisdel filament yarn (220 de/72 fils) with an elongation of 350% obtained by spinning at a speed of 1500 m and 7 Kin.
In the steps shown in the figure, entangling treatment and stretching false twisting and raising were performed.

, At that time, an overfeed rate of 1.0%, a compressed air pressure of 5.5, and 91 crd were used to provide 38 entanglements/m using an interlace nozzle, followed by a stretching ratio of 1,892 times,
Stretching and false twisting was carried out at a false twist number of 2450 T/m, a heater temperature of 200° C., and a yarn speed of 400 m/7 sin.

There were no weaving problems (the resulting fabric had a spun-like and soft texture.

Example 4 Using a device in which a false-twisted/raised friction body is constructed of a twisted friction disk and a raised friction disk as shown in FIG. We compared the effects of a twisted friction plate with no action and a raised friction plate with a raised action. That is, as in the embodiment shown in FIG. 6, the friction plates 24, 28, 29, 30, 31, and 32 are twisted friction plates, and the friction plates 25, 26, and 27 are raised friction plates; .29.30.51 was used as a twisted friction plate, and 25.26.32 was used as a raised friction plate.

The yarns are undrawn polyester filaments (220de/72 fits) with an elongation of 350% and partially oriented polyester filaments (115de/24 fits) with an elongation of 120%.
fiLs ) were aligned and interlaced in a conventional manner (40 entanglement points/m), and then stretched and false-twisted and raised in the process shown in FIG. 5.

What are the processing conditions?

Stretching ratio: 155 times Heater temperature: 200°C Surface speed of twisted/raised friction body: 700 m/sin
Yarn speed: Processed at 550 m7m1n. The results are shown in Table 2.

1='ゝ・Gonlyashinhe'L: From the above table, when the friction plate on which the thread comes into sliding contact at the end is a twisted friction plate (/I65), compared to the case where a raised friction plate is used, It can be seen that the fluff length is short and the number of yarn breaks is also reduced.

Embodiment 5 A device consisting of a false twisted/raised friction body as shown in FIG. 6 is used, and the friction plates are arranged as shown in FIG. , 28.29.50.5
The effect of the diameter of the raised friction plates was investigated using 1.32 as a twisted friction plate and 25°26 and 27 as raised friction plates. still,
The diameter of the twisted friction plate is 50 silk, and the axis is 17.18. Warpage 1
9 was set at a distance of 37 m. The surface roughness of the twisted friction plate was 2S.

The raw yarns are undrawn polynisder filaments (220 da/72 fils) with an elongation of 350% and partially oriented polyester filaments (115 de/24 fils) with an elongation of 120%.
fils) were aligned and treated with Innotarlace (40 entanglement points/m) in the usual manner, and then stretched and false-twisted and raised in the process shown in FIG. 5.

What are the processing conditions?

Stretching ratio: 1.56 times Heater temperature 11j: 195°C Surface speed W of twisting and brushed friction body: 700 m/min
Yarn speed: Processed at 350 m/min. The results are shown in Table 3.

As is clear from the table above, the diameter of the twisted friction body is 505
When the diameter is m or smaller, the false twist is well incorporated and the proportion of long fuzz is small, resulting in a good effect. This effect is particularly great when the surface of the brushed friction plate is rough.

Example 6 Using a device in which a false-twisted/raised friction body as shown in Fig. 6 is composed of a twisted friction disk and a raised friction disk, the effect on the composition of the number of twisted friction plates and raised friction plates was evaluated. We considered this. As shown in Fig. 6, three friction plates are fixed to each of the shafts 17, 18, and 19, among which friction plates 24 and 32 are twisted friction plates, and friction plates 25 to 31 are initially only 25. are used as brushed friction plates, and sequentially 25 and 26.25°26 and 2
The number of brushed friction plates was increased one by one, such as 7. The twisted friction plate has a surface roughness of 28. The brushed friction plate used was a diamond coated friction plate with a roughness of 800 mesh.

The raw yarns are undrawn polyester filaments (220 da/72 fils) with an elongation of 350% and partially oriented polyester filaments (115 de/24 fils) with an elongation of 120%.
Using a yarn that had been interlaced (42 entanglement points/m) in a conventional manner by aligning fiL+), it was subjected to a stretching false twist raising process in the process shown in FIG.

The processing conditions were: stretch ratio = 1.56 times heater temperature = 210°C, surface speed of the twisted/raised friction body: 870 m/m, yarn speed change rate: 450 m/m. The results are shown in Table 4.

Table 4 As is clear from the table above, when the number of twisted friction bodies is greater than the number of brushed friction plates, when the number of twisted friction bodies is more than twice the number of brushed friction plates (15 to 17 scraps), the number of false twists is large. Many of the fibers have short fibers and fluff length, and very good results can be obtained.

Embodiment 7 A device consisting of a false twisted/raised friction body as shown in FIG. 5 is used, and the friction plates are arranged as shown in FIG. .28.29.30.
51.52 is a twisted friction plate 25°, 26 and 27 are brushed friction plates, and the thickness of each friction plate (T5, the radius of curvature of the arcuate cross section of the end face (■ (the effect of R5 was studied) The diameter of each friction plate was 50M, and the distance between the shafts 18 and 19 was 5711II.The twisted friction body was made of ceramic with a surface roughness of 2S, and the brushed friction plate was made of ceramic with a surface roughness of 2S. A diamond coated material with a roughness of 600 mesh was used.

The raw yarns are undrawn polyester filaments (22, Ode/72 filg) with an elongation of 350% and partially oriented polyester filaments (i15de/24f) with an elongation of 120%.
Using a yarn that had been interlaced (40 entanglement points/m) in a conventional manner by aligning the yarns (i.e. ils) and interlacing them (40 entanglement points/m), the yarn was drawn, false-twisted and raised in the process shown in FIG.

The processing conditions are: Stretching ratio: 1.56 times Heater temperature = 200°C Surface speed of twisted/raised friction body: 970 yn/m,
%l [degrees: Processed at 500 m/in. The results are shown in Table 5.

As shown in the table above, the shapes of the twisted friction disk and the raised friction disk are T=
5-10 m, T'= 5-10 Nil, R/T=
In the case where shiba ~1 and R'/T' = tip ~1 are satisfied at the same time (rotation 21 to 25), good results can be obtained that simultaneously satisfy a higher level of the number of false twists, a short length, and a large number of fuzz.

[Brief explanation of drawings]

Figures 1 to 4 are enlarged side views showing the structures of textured yarns (comparative examples) obtained depending on the processing speed when two yarns with different elongations are aligned and subjected to false twisting and crimping processing. , Fig. 5 is a schematic diagram showing one aspect of the apparatus for carrying out the present invention, Fig. 6 is a front view of a napping/friction false twisting tool suitably used in the present invention, and Fig. 7 is a diagram showing the difference in elongation. FIG. 8 is an enlarged side view showing the structure of a yarn obtained by interlacing two threads obtained by aligning, false twisting, crimping, and raising processing, and FIG. 8 shows the structure of the yarn of the present invention. FIGS. 9 and 10 are enlarged side views showing an incomplete thread structure shown as a comparison of the thread structure in FIG. 8. FIG. In the figure, 1: Yarn with lower elongation 2: Yarn 2 with higher elongation 2: Cut free end (fuzz) of yarn with higher elongation 3.3': Yarn 4 Ni guide 5 : Tension device 6 : Feed roller 7 : Interlace nozzle 8 : First delivery roller 9 : Heater 10 : False twisting tool 11 : Second delivery roller 12 : Winding roller 12 : @take cheese 13 Ni brackets 14 to 16 : Bearing 17-19: Friction body attachment shaft 17a: Pulley 18a: Pulley-18b: Pulley-19a: Pulley-20: Drive wheel 21-22: Timing belt 23: Drive belt 24: Twisted friction plate 25-27: Raised friction plates 28-32: Twisted friction plates 33-34: Lower side 1 D: Diameter T of twisted friction plates: Thickness R of twisted friction plates: Radius of curvature of end face of twisted friction plates T': Thickness of the brushed friction plate R': Radius of curvature of the end surface of the brushed friction plate t: Distance between adjacent friction disks Y: Yarn No. 31" Whistle + Volume No. 8 Figure M91" (olEJ = 216

Claims (9)

[Claims] (1) Two or more types of filament yarns that can be drawn at a draw ratio of at least 1.2 times and have a difference in elongation of at least 80% or more are mixed and entangled with each other, and at least 20 filament yarns/ A spun-like two-layer structure fluff characterized in that the yarn is simultaneously stretched, false-twisted and crimped at a stretching ratio of 1.2 times or more while being entangled with M, and the yarn is subjected to a napping treatment during false-twisting. How to make yarn. (2) One filament yarn is composed of partially oriented yarn with an elongation of 100 to 250%, and the other filament yarn has an elongation of 2
Claim 1 is composed of 50% or more undrawn yarn, and there is a difference in elongation of at least 80% between the two yarns.
A method for producing a spunlike two-layered fuzzy yarn as described in Section 1. (3) A method for producing a spunlike two-layered fluff yarn according to claim 1 or 2, wherein the number of intertwining points is in the range of 30/M to 100/M. (4) The method for producing a spunlike two-layered fluffy yarn according to claim 1, wherein the stretching ratio is 1.2 to 2.5. (5) The method for producing a spun-like two-layered fuzzy yarn according to claim 1, wherein the false twisting tool is a circumferential friction false twisting tool. (6) A false twister holds three or more shafts equipped with a plurality of disc friction elements in parallel so that the discs of each shaft partially overlap and intersect with each other and are located along a spiral. A twisting friction body that applies only false twist to the yarn using a plurality of disc friction bodies when provided;
A method for producing a spun-like two-layered fluffed yarn according to claim 5, which comprises a raised friction body that imparts fluff to the yarn. (7) The method for producing a spun-like two-layered fluffy yarn according to claim 6, wherein the friction body with which the yarn comes into sliding contact at the end is a twisted friction body that does not have a raising effect. (8) The method for producing a spunlike two-layered fluff yarn according to claim 6 or 7, wherein the diameter of the raised friction body is equal to or less than the diameter of the twisted friction body. (9) A method for producing a spunlike two-layer fuzzy yarn according to claim 1 or 2, wherein the filament yarn is made of a polyester polymer.