JPS623254B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heathered yarn that exhibits a slub-like appearance due to differences in color tone.

The present invention also relates to improvements in slub yarns and heathered yarns.

Conventionally, a wide variety of slub yarns with thick sections have been known, but in all of them, the slub form is unstable, the slub form lacks beauty, and the presence of the slub is difficult to achieve. It had defects that hindered the ability to pass through the processing process. Furthermore, the production of slub yarns is by no means simple, and there are many inherent defects in terms of equipment and work.

For example, there is a method of varying the amount of staples supplied to the front roller in the spinning process, but the equipment for varying it becomes large and complicated, and it also reduces spinning performance. Due to this, short slabs cannot be formed, and the number of twists in the slab is less than that of the base yarn, resulting in poor convergence.

As a second example, in the process of false twisting multifilament yarn, there is a method in which the core yarn is intermittently wrapped with other yarns in single or triple layers. The winding part is naturally occurring, and there are many restrictions on thickness, length, spacing, and their irregularities, making it difficult to obtain a slab of your choice, and triple winding has a structure in which the thread is folded back. Therefore, the shape stability is poor, and since the thickness of the slab is uniform, it is stepped at both ends, and exhibits pinhole-like defects, especially in textiles.

As a third example, introducing a multifilament yarn under fluid turbulence, forming and disturbing a loop of the yarn,
There are methods for creating folded structures such as triple, five, and seven folds, but these types of slabs are generally unstable in form and cannot withstand high-order processing.

A fourth example is so-called designed twisted yarn, in which two or three or more yarns are twisted together in a skillful way. According to this method, yarn of extremely high quality can be obtained, and most of the slub yarns conventionally used are of this type. However, it is difficult to obtain thin threads and is extremely expensive, so it lacks substantial versatility.

Furthermore, a wide variety of heathered yarns are known, which are obtained by twisting or interlacing a plurality of yarns of different colors or dyeability, but they generally have a monotonous color tone. The present inventors have already filed a patent application to improve this drawback.
56-37286, but further improvements were desired.

The present invention was obtained as a result of intensive research in view of the deficiencies of the prior art as described above, and the main points thereof are as follows.

That is, the present invention provides a multifilament yarn composed of two or more types of filament fibers having different colors or dyeability, and the yarn has intertwined portions A and unentangled portions _Bs alternately along the yarn axis. Alternately, the existing heathered yarn portion X, and the slab yarn portion Y consisting of the non-entangled portion _Bl having a relatively long length with respect to the length of the unentangled portion _Bs are alternately c, and 90% or more of the total number of unentangled parts of the thread portions X and Y have a length of 30 mm or less,
Furthermore, an unentangled part B having a length of 30 mm or less
The slub-like heathered yarn is characterized in that there is a non-interlaced portion B _l having a length that is three times or more the average length of _s .

In the yarn of the present invention, when a multifilament yarn consisting of multiple types of filament fibers with different colors or dyeability is engaged in a fluid jet intermittent entangling treatment device,
This can be obtained by intermittently supplying fluid to the device or by intermittently performing the engagement, and by intermittently performing the intermittent entangling process.

In order for the yarn of the present invention to exhibit remarkable effects as a slub-like heathered yarn, substantially all of the unentangled portions present in the yarn must be clearly divided into long unentangled portions and short unentangled portions. It is important that it exists in a state that can be classified into two types. In other words, the fluid injection process is performed intermittently, and the series of intermittent entangled parts formed in one continuous treatment section can be clearly distinguished from the unentangled parts of the non-treated section, and the series of intermittent entangled parts are composed of multiple types of filament. should have a good mixing condition and a heathered tone, and the unentangled portions of the series of unprocessed sections should be recognizable as streaks or slab tone due to color difference due to a poor mixing condition. Therefore, the unentangled portion within the series of intermittent entangled portions must be relatively short when compared to the unentangled portion of the unprocessed section. In other words, in terms of the length of the unconfounded part of the unprocessed section, it must be relatively long when compared to the unconfounded part in the intermittent confounded part.

The length of the unentangled portion of the untreated section can be freely designed, and the length of the series of intermittent entangled sections formed in one continuous treated section can also be freely designed. However, although the length of the unentangled portion within the series of intermittent entangled portions can be designed to some extent depending on the processing conditions, etc., it largely depends on the performance of the fluid injection intermittent entangled processing device, and it is necessary to select the device. Furthermore, since the intermittent entangling process tends to be incomplete at both ends of the series of intermittent intertwined sections and a relatively long unentangled section is likely to be formed, the operation and action of the device should be made to respond promptly to the formation of the intermittent entangled sections. Consideration is required.

According to the findings of the present inventors, in order to significantly exhibit the slub-like effect targeted by the present invention, 90% or more of the number of unentangled portions in the entire yarn must have a length of 30 mm or less. It is effective that
It is important that there is a non-entangled portion B _l that is a non-processed section and has a length that is three times or more the average length of _s .

In the slab-like heathered yarn of the present invention, the fluid injection treatment is performed intermittently, and in order for the series of intermittent entangled portions formed in one continuous treatment section to exhibit a heathered tone, the non-containing portions forming the series of intermittent entangled portions must be The interlaced part needs to be relatively short, but objectively, if the length is 30 mm or less, the interlaced parts A on both sides are sufficiently mixed by interlacing, so the interlaced part A is unconfounded part B of
_s also assumes a mixed state, and the series of intermittent intertwined portions X as a whole becomes well mixed and exhibits a heathered appearance. Also,
If the length of the unentangled part _Bl , which is a series of unprocessed sections, is three times or more longer than the unentangled part _Bs , the mixing condition will be poor, and it will become streak-like and can be clearly distinguished from the unentangled part,
It gives off a slab-like effect. Furthermore, the number of B _l is
When the number of unentangled parts is as small as 10% or less of the total number of unentangled parts, their presence becomes conspicuous in the entire thread.

In the present invention, by intermittently interlacing the heathered yarn portion X, the entanglement is stabilized, and the shape of the yarn as a whole can be stably maintained.

On the other hand, there is a fluid jet entangling treatment device that involves the formation of loops and sag in the constituent filaments, in which the yarn is injected with fluid and entangled substantially continuously, but fluid is intermittently supplied to the device. if you did this,
Entanglement cannot occur without the formation of loops and sag, so if the yarn is always supplied in excess so that loops and sag can be formed, when the device is activated and fluid is ejected, the yarn will be ejected all at once. However, it is difficult to produce high-quality slub-like grained yarn using this device because large balls of yarn are produced or the entanglement becomes impossible.

As the raw yarn constituting the yarn of the present invention, various mixed multifilament yarns made of a plurality of types of filaments having different colors or dyeability, crimped yarns thereof, or other processed yarns can be used. Examples of materials having different dyeability include nylon, acrylic, polyester, acid dyeable polyester, cationic dyeable polyester, spun-dyed yarn thereof, acetate, rayon, and silk. Generally, different materials have different dyeability.

When making a woven or knitted fabric using the yarn of the present invention, it may be used 100%, or it may be mixed or knitted with other yarns. Cross-knitting or interweaving of the yarn of the present invention in which the slub-like yarn portion Y is formed at high density with a yarn that is the same as the constituent raw yarn of the yarn and consists only of the heather-like yarn portion is an advantageous method of using the yarn of the present invention. There is one.

Next, the present invention will be explained using the drawings. FIG. 1 shows the length relationship between the heathered thread part X and the slub thread part Y. Of course, it is possible to use various combinations other than the one shown in FIG. The present invention may have various variations other than those shown in FIG. 1A to F. Next, FIG. 2 is an enlarged view of the heathered thread part X and the slab thread part Y of FIG. 1. It is shown that the slab-like yarn portion Y consists of a relatively long non-entangled portion _Bl , and the heathered yarn portion X consists of an interwoven portion A and a relatively short non-entangled portion _Bs .

Example A polyester multifilament yarn (75 denier - 36 filaments) and a nylon multifilament yarn (70 denier - 24 filaments) were aligned and subjected to false twisting with a number of false twists of 1800 T/m. Pressurized air was then directed through a solenoid valve to a fluid jet intermittent entangling device and the yarn was engaged with the device at a speed of 300 m/min. Solenoid valve is 1msec
Opens and closes using electrical signals from the unit. Close 10~40msec,
The opening was performed alternately at random between 0.5 and 1.0 seconds to obtain a slub-like heathered yarn.

The length of the heathered yarn portion X was 2.5 to 5 m, and the short unentangled portion _Bs therein was 8±2 mm.

The long unentangled part B _l , which is the slab thread adjustment part, is 50~
It was 200mm.

A woven fabric (twill) using this thread was dyed black with polyester leaving the nylon black. As a whole, white and black streaks appeared in the black and white heathered tone, giving it a slab-like appearance. There were also cases where one of the stripes changed from white to black.

[Brief explanation of the drawing]

FIG. 1 shows a model of the slub-like heathered yarn of the present invention. FIG. 2 shows an enlarged model of the heathered thread part and the slab-like thread part of the slub-like heathered thread in the present invention. X: heathered yarn part, Y: slub-like yarn part, A: interlaced part, B _s : relatively short unentangled part, B _l : relatively long unentangled part.

Claims (1)

[Scope of Claims] 1. A multifilament yarn consisting of two or more types of filament fibers having different colors or dyeability,
The yarn has, along the yarn axis, a) a heathered yarn portion X in which intertwined portions A and non-entangled portions B _s exist alternately; and b relative to the length of the non-entangled portion B _s . A slab-tuned yarn portion Y consisting of unentangled portions _B having a long length; It is of the following length,
Furthermore, an unentangled part B having a length of 30 mm or less
A slub-like heathered yarn characterized in that there is a non-interlaced portion B _l having a length that is three times or more the average length of the lengths of _s .