JPS596930B2 - spun-like processed yarn - Google Patents

Description

[Detailed description of the invention] The present invention relates to spunlike textured yarn.

More specifically, it is a novel spun-like process that exhibits extremely spun-like characteristics in terms of texture such as crimp characteristics and fluff characteristics made of synthetic fiber multifilament yarn, and also in terms of the appearance of the yarn and fabric when dyed. It is about thread.

Many attempts have been made to impart spun yarn-like properties to multifilament yarns.

The aim of these attempts was to give the filament yarn a spun-like bulkiness, and to make the texture or appearance similar to that of a spun when made into a fabric, but these attempts mainly focused on a single characteristic. Most of the yarns have been realized with the aim of making them spun-like, and the current situation is that a synthetic fiber multifilament yarn that has overall spun-like characteristics has not yet been completed.

First of all, in terms of bulk, there are various types of crimped yarns, typified by conventional false twisting, and yarns created by giving different fiber lengths and converging them. However, the bulkiness of the spun yarn itself is closer to the latter.

Adding bulkiness generally brings the feel of the fabric closer to that of spun yarn, but there are also yarns with fiber rings or walnuts fixed to the yarns, or yarns with cut ends of fibers attached to the yarns. There are known threads with fixed

Comparing these, the latter is more similar to spun yarn, but it is technically difficult to cut the fibers without cutting the yarn, and there is currently no completed method.

Furthermore, as a conventional example, a technique disclosed in Japanese Patent Application Laid-open No. 51-127238 is known, but this technique involves drawing an undrawn yarn unevenly to make an uneven yarn, and then subjecting it to false twisting or secondary heat treatment under overfeed. However, since the fluff is then generated by jetting a fluid, the fluff ends are unstretched and crystallized, and the collation is hard and has a thick tip, which tends to cause fluff.

Next, when considering the appearance of a fabric made from spun yarn, spun yarn has uneven thickness, and when made into fabric, it produces subtle, pleasant kasuri spots.

In order to make such kasuri spots appear, multifilament yarns are treated with slub-like dyeing to create dye spots.

However, in general, slub yarns have too thick irregularities in thickness, and if there are slight dyeing irregularities, they are more similar to spun yarns.

As a result of intensive research into the characteristics of spun yarn, the characteristics of multifilament yarn, and the processing behavior in view of the prior art described above, the present inventors obtained a multifilament yarn that is extremely close to the characteristics of spun yarn. We have come to offer it.

That is, the present invention is a multifilament yarn having a false twist crimp made of thermoplastic synthetic fiber, each of the constituent filaments having a thick to thin portion ratio of 1.5 to 3.0. It is a thick and thin thread that has random parts, and the thick parts are present randomly when looking at the thread as a whole, and when the cross section of the thread is taken, the number of filaments that make up the thick part is 1/12 or more of the total number of filaments1
There is at least one cross-sectional portion per 1 m of the yarn that occupies less than 1/2, and the cross-sectional portion that occupies 1/2 or more is less than 1 per 1 m of the yarn;
A spunlike processed yarn characterized in that it has a cut end made of zero or more of the thin constituent filaments.

It is.

Hereinafter, the spunlike textured yarn of the present invention will be explained in more detail.

The spunlike processed yarn of the present invention is a multifilament yarn having crimps, fluff, and dye spots.

Appearance and texture are extremely important factors when making yarn-like fabrics, and in the spunlike processed yarn of the present invention, dyeing spots mainly affect the appearance, while crimp and fluff mainly affect the texture. It acts on

First, I will explain about staining spots.

In the spunlike processed yarn of the present invention, dyeing spots are expressed by the thick portions and thin portions present in each filament, and the thick portions are the darkly dyed portions.

The degree of thickness of the thick part is such that the ratio of thick to thin part is 1 compared to the thin part.
．． It needs to be between 5 and 3.0.

If the thickness ratio is outside this range, it will not be effective at all.

According to the studies of the present inventors, when a multifilament yarn having a thick and thin structure as in the present invention is generally dyed, there is a darkly dyed part, and the darkly dyed part is defined as the thread when viewed in the longitudinal direction. This is a yarn portion where the number of dark dyed filaments is mixed in a large proportion to the number of constituent filaments, and in particular, according to the knowledge obtained by the present inventors, this is a yarn portion where the mixing ratio is 1/12 or more, and in the vicinity of the yarn portion (approximately If there is a thread part within 1 m) with a blending ratio less than half of the blending ratio of the thread part, that thread part is recognized as a darkly dyed part.

That is, the shading naturally includes relative factors (shading factors in the vicinity).

Also, in the dark dyed yarn part, the blend ratio of the dark dyed filaments is 1
If it is 2 or more, the difference in shading is too strong, and it is not possible to obtain the fine and pleasant kasuri spots similar to spun yarn, which is the object of the present invention.

Table 1 shows the findings obtained by the present inventors regarding the number of darkly dyed filaments in the darkly dyed yarn portion in a broad sense and the effect thereof on the fabric.

The boundaries in Table 1 are continuous and cannot necessarily be clearly divided, but based on the knowledge obtained by the present inventors, the region (2), which is a necessary condition of the present invention, was extended and divided.

In Table 1, there is a region between area ■ and area ■ that exhibits faint kasuri spots, but these kasuri spots are clearly different from kasuri spots caused by unevenness in the thickness of the spun yarn. , it doesn't give a pleasant feeling at all.

FIGS. 1 and 2 are schematic diagrams of yarn for explaining the structure of the spunlike processed yarn of the present invention.

1 is a filament, 2 is a filament cut end, and 3 is a deep dyed filament.

The diagonal numerals in FIG. 1 indicate the number of deep dyed filaments in that yarn section.

The number of filaments constituting the thread is arbitrarily considered in the figure.

In the figure, the number of dark dyed filaments is dispersed between 0 and 4, and the yarn portions A5 j A8 j B5 are dark dyed yarn portions in a broad sense.

In the thread part A5, the number of dark dyed filaments constituting A3 is 3, and A3) A7 is one, which is less than half the number of dark dyed filaments of A, and A3+A7 is A3.
5, and the mixing ratio of A5 is 1/12 or more (
If the yarn composition is 1 filament and the number is 36 or less), A5 is recognized as a darkly dyed yarn portion.

In reality, A4 to A6 or A3 to A7 are recognized as the darkly dyed yarn portion, and if A5 and A8 are located very close to each other, A3 to A9 are recognized as the darkly dyed yarn portion.

In addition, if the number of filaments constituting the thread is 6 or less, A
When the mixing ratio in No. 5 is 1/2 or more, A5 becomes the yarn portion in area (3) of Table 1.

The number of yarn constituent filaments obtained in this way and the first
Table 2 summarizes the relationships between the various areas shown in the table.

In the example shown in Figure 2, the number of dark dyed filaments is 2 to 4.
It is difficult to actually recognize the difference in shading in the threads as they are dispersed over the entire area between the books.

In such a yarn, if the number of filaments making up the thread is large, it will appear uniform and will be the thread part of area ■.Also, if the number of filaments making up the thread is small, it will be the thread part of area ■ and will look uniform, and the number of filaments will be in the middle. In this case, it becomes a marbling tone and becomes the thread part of area (■).

The above explanation is only about the thread part,
When viewed as a fabric, the frequency of darkly dyed yarn portions is an extremely important requirement in terms of spunlike formation.

That is, if there are too few dark dyed yarn parts, there will be little effect, if there are too many, it will approach a marbling tone, and if there are even more, it will look uniform.

According to the knowledge obtained by the present inventors regarding such an effect on fabric, when there is one or more darkly dyed yarn portions per meter of yarn, the effect on fabric is greatly exhibited in terms of spun-like appearance.

Therefore, the spunlike processed yarn of the present invention has one or more darkly dyed yarn portions in area ① in Table 1 per 1 m of yarn,
In addition, it is necessary that the number of darkly dyed yarn portions in area (3) be one or less per meter of yarn.

The inventors have confirmed that when there are many darkly dyed threads in area (3), a desirable Kasuri tone is obtained even if there are a large number of threads present, and in experiments, it was found that even threads present in 100 locations exhibited a desirable Kasuri tone. .

In providing the spunlike processed yarn of the present invention, the range that the present inventors have experimentally confirmed is that in addition to the above, the length of the darkly dyed yarn portion is from about 4 mm to 150 mm, and the yarn denier structure is 50 mm ( Denier) -12 (filament), 50-1
6, 50-18, 50-124, 50-36, 75-24
, 75-36, 150-30, 150-48, 150-
It is 72.

Next, the number of thread fuzz (cut end of filament) is:
In order to produce the effect of spunlike processed yarn as a fabric, it is necessary to have 10 or more pieces per meter of yarn.

By cutting the filament ends in this manner, the warmth, frictional properties, anti-snagging properties, etc. of the fabric become similar to that of spun yarn.

The above-mentioned spunlike processed yarn of the present invention is obtained by a special drawing treatment and false twisting process, and a typical example of the method for producing the spunlike processed yarn of the present invention is a thermoplastic synthetic fiber undrawn multifilament yarn. Then, the yarn is continuously stretched at a stretching ratio lower than the natural stretching ratio and at a temperature higher than the crystallization starting point of the yarn, so that thick fiber portions and thin fiber portions are irregularly formed in each filament. After obtaining the dispersed drawn yarn, this method further subjects the drawn yarn to false twisting in an underfeed state so that the total draw ratio exceeds the natural draw ratio.

By stretching as described above and false twisting under the underfeed,
Each of the constituent filaments is a thick and thin thread that randomly has thick parts with a thick-to-thin ratio of 1.5 to 3.0 compared to the thin part, and the thick parts are random when looking at the thread as a whole. and when the yarn cross section is taken, the cross-sectional portion in which the number of thick filaments accounts for 1/12 or more and less than 1/2 of the total number of filaments is at least 1 per 1 m of the yarn. There are two places, and one
A yarn can be obtained in which the number of cross-sectional areas occupying /2 or more is 1 or less per 1 m of the yarn.

False twisting may be done by a normal method.

This false twisting action causes the filaments to be cut, resulting in a fluffy spunlike yarn.

In such a false twisting process, the higher the false twisting tension, the more fluff is generated.

Additionally, in the case of spindle false-twisting, the smaller the number of false twists, the more fluff will occur.In the case of friction false-twisting, it is difficult to change only the number of false twists alone, so adjusting the roughness of the friction body can reduce the generation of fluff. It is better to control the roughness, and the rougher the roughness, the more fluff will occur.

Furthermore, the greater the passing resistance of the false twisting device, the more fuzz is generated.

In such a false-twisting process, fuzz is generated in the false-twisting area and when passing through the false-twisting device.

In addition, since fuzz tends to reduce the strength of the yarn, it is also effective to perform an interlacing treatment as desired after the false twisting process.

In this case, after the false twisting process, it is necessary to perform the entangling process continuously without interrupting the process once.

When obtaining the spunlike processed yarn of the present invention, it is absolutely impossible to unambiguously state the detailed manufacturing conditions depending on the various raw yarns to be supplied. By adjusting the settings, the yarn of the present invention can be obtained.

In the present invention, the cut end of the filament is mainly subjected to the stretching action by the underfeed during false twisting and is torn off, so the tip becomes the cut end of the filament 1 made of fine fineness (No. 2 in Figure 1). It has a soft texture and feel, and does not pill easily.

In addition, the thicker fineness portions within the yarn are also stretched to a shorter length during stretching under the underfeed, making it possible to exhibit a stronger splashed pattern.

[Brief explanation of drawings]

FIGS. 1 and 2 are schematic diagrams of yarns for explaining the structure of the spunlike processed yarn of the present invention.

Claims (1)

[Claims] 1 A multifilament yarn having false twist crimp made of thermoplastic synthetic fiber, each of the constituent filaments 1
The book is a thick and thin thread that randomly has thick parts with a thick-to-thin ratio of 1.5 to 3.0 compared to the thin part, and the thick parts are randomly present when looking at the thread as a whole. , when the thread cross section is taken, the number of filaments 1, which are the thick parts, is l/12 of the total number of filaments.
There is at least one cross-sectional portion per 1 m of the yarn that occupies less than 1/2, and there is no more than 1 cross-sectional portion per 1 m of the yarn that occupies 1/2 or more, and the yarn is
A spunlike processed yarn characterized in that each cut end is made up of 10 or more of the thin constituent filaments.