JPS6136100B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel composite yarn. It also relates to an improved twisted yarn.

More specifically, two twisted uneven threads are used as constituent threads, the two constituent threads are aligned, and the constituent threads are intertwined with each other in at least one portion along the yarn axis. The present invention relates to a composite yarn formed by combining the component yarns with each other.

Twisted yarns, that is, yarns whose twist density is not uniform along the yarn axis, have been well known.
In particular, the S and Z twists are alternately twisted, but alternating yarns are a notable example of unevenly twisted yarns.

Twisted mottled yarn is a fabric with a unique pattern created by the texture of the yarn and the mottled threads caused by the twisting, and its value is highly valued.

In addition, in the formation of twisted yarns, especially alternating yarns,
Compared to the formation of real twisted yarn, the twisting efficiency is high and its value is high in terms of productivity.

However, when a twisted yarn is subjected to tension, the twist density tends to change to become uniform along the yarn axis, and in particular, in the case of an alternately twisted yarn, when subjected to tension, the S-twisted yarn portion along the yarn axis The twists of the Z-twisted yarn portion and the Z-twisted yarn portion cancel each other out, showing a tendency to change to a non-twisted yarn. In addition, if the yarn has a turning force that correlates with the twist density along the yarn axis, simply leaving it in a free state without being constrained by the side of the yarn will cause it to be free from any particular tension. also shows a tendency to change in the same way as above. Therefore, in such yarns, twist unevenness is reduced during the time from when the yarn is formed until it is wound, during the weaving and weaving preparation process, and furthermore during the weaving and weaving process until it is formed into a fabric. However, it is extremely difficult to maintain the formed twist spots until after the fabric is formed, and the intended purpose has not been fully achieved.

In the past, many attempts have been made to avoid the above problems, but all of them have been insufficiently effective. For example, there is a method of applying heat treatment or the like to weaken the turning force corresponding to the twist density, but even such treatment has almost no effect on the action of tension. Furthermore, there is a method of bonding and fusing the constituent fibers of the yarn to each other by strengthening heat treatment or attaching other components to the yarn. This method is more effective in maintaining uneven twisting as the degree of adhesion and fusing is stronger against the action of tension, but on the other hand, the texture of the twisted yarn is impaired and the yarn is hardened, making it undesirable. It becomes something that does not exist.

In view of the above-mentioned deficiencies in the conventional technology, the inventors of the present invention conducted intensive research to obtain excellent twisted yarns, and as a result, they were able to achieve their objective by interlacing and compounding twisted yarns. This is what we have come to offer here.

That is, the composite yarn of the present invention is a composite yarn consisting of two constituent yarns, both of which have uneven twisting along the yarn axis and are intermittently spread along the yarn axis. The composite yarn is a multi-filament yarn having intertwined yarn portions, and furthermore, the composite yarn has a yarn portion where both constituent yarns are intertwined in an open state along the yarn axis, and one of the constituent yarns is intertwined. It is a composite yarn characterized by having thread portions that are intertwined in a spread state, the other constituent threads have a twist, and are in a non-spread state.

The present invention will be explained in more detail below.

In the present invention, twist unevenness refers to the fact that the distribution of twist density is not uniform or uniform, and the twist number distribution is not uniform even in those with alternating twists and even in those with only unidirectional twists. This includes everything that is generally considered to have twist spots, including those that do not. In the case of an alternating twist, the total of S twist and Z twist may be zero (non-twisted), or the total may be twisted. In addition, both alternately twisted and unidirectionally twisted pieces may include a part of non-twisted parts.

In addition, multifilament yarns include multifilament yarns, their processed yarns (filament fiber bundles), spun yarns (staple fiber bundles), and fiber bundles that use a mixture or combination of staple fibers and filament fibers. It refers to threads made of fibers.

Furthermore, in the present invention, constituent yarns refer to individual yarns constituting a composite yarn, and discuss the state of the yarns under the state in which the composite yarn is formed. In the composite yarn, the constituent yarn is the above-mentioned multifilament yarn, but in addition, some of the constituent fibers form protruding fibers such as loops, snarls, snarls, fluff, etc., along the yarn axis direction, Yarns with varying structures, such as yarns with slabs, yarns with dye differences, yarns with differences in heat shrinkage rates, yarns with differences in strength, yarns with differences in elongation, etc., with differences in form and physical properties. Yarns, as well as mixed fiber yarns with differences in heat shrinkage, elongation, strength, color, dyeability, fineness, cross-sectional form, gloss, and other material and physical properties.
etc. may be used.

In the present invention, the individual yarns constituting the composite yarn, which are in a state before forming the composite yarn, are referred to as constituent raw yarns, and have a character that is clearly distinguished from the above-mentioned constituent yarns. .

The composite yarn of the present invention is composed of two constituent yarns, and there are differences in heat shrinkage, elongation, strength, color, dyeability, fineness, and cross-sectional shape differences between the constituent yarns. , differences in gloss, other differences in materials, differences in physical properties, etc. are acceptable. The composite yarn may have ply twist, alternate twist, or the like.

In addition, the spread state refers to a state in which other constituent yarns or constituent fibers of other constituent yarns exist between the fibers that make up the own yarn (multifilament yarn). be. Therefore, in the present invention, the composite yarn is characterized by the composite state of the threads constituting the composite yarn in a state where the composite yarn is made into a composite yarn. For example, before compounding, If we look at just one component raw yarn, even if there is a part of the yarn that is generally recognized to be opened, the part that is recognized to be opened after compounding is In the case where other yarns or constituent fibers of other yarns are substantially completely absent, the composite yarn is significantly different from the composite yarn of the present invention, and at least does not meet the objectives of the present invention. There are also cases where it is impossible to obtain such an effect. The reason for this will become clear in the following explanation.

Under the above premise, the composite yarn of the present invention is composed of two constituent yarns, both of which have uneven twists along the yarn axis and are intermittently opened along the yarn axis. The composite yarn is a multi-filament yarn having yarn portions that are intertwined in a fiber state, and furthermore, the composite yarn has a yarn portion where both component yarns are entangled in an open state along the yarn axis, and one It is characterized by having a thread portion in which the constituent yarns are intertwined in a spread state, the other constituent threads are twisted, and are in an unspread state.

To explain this composite yarn in more detail with reference to drawings, etc., the two multifilament yarns constituting the composite yarn have uneven twisting and are intermittently intertwined in an open state, as described above. Therefore, the multifilament yarn has yarn portions that are intermittently twisted.

FIGS. 1 and 2 are model diagrams for explaining the composite yarn of the present invention, and FIG. 1 is a model representation of the constituent raw yarns.

In Fig. 1, constituent yarn models 1 and 2 both take alternately twisted yarn as an example, and a non-twisted and non-focused portion B exists between the S-twisted portion A and the Z-twisted portion A'. The non-twisted and non-focused part B
is in a state where it can be entangled when the yarn is engaged with the fluid jet entangling device.
The constituent yarns 1 and 2 are alternately twisted yarns, and needless to say, they have uneven twists.

Constituent yarns 1 and 2 shown in FIG.
When the pitch at which the untwisted and unfocused portion B appears is substantially equal to the pitch at which the twisted portions A and A' appear in the constituent yarn 2, and when the yarns 1 and 2 are aligned, , one thread is A
Or in the part that is A', the other thread is B
are the corresponding combinations of B
and A or A′ in each corresponding part B
This shows an example of a combination in which A is longer than A or A'.

Figure 2 shows the yarns 1 and 2 having the structure shown in Figure 1.
1 is an enlarged view showing a model of the composite yarn of the present invention obtained using the method, and is a model consisting of constituent yarns 1' and 2'.

In Fig. 2, the area indicated by B/B is the yarn part where both constituent yarns are intertwined in an open state along the yarn axis, and the area indicated by A/B is the yarn part where one of the constituent yarns is spread and intertwined. This is a yarn portion that is intertwined in a state where the other component yarn has a twist and is not in an unspread state.

The composite yarn of the present invention may have structural parts other than these. For example, in the area shown by C in FIG. 2, one of the constituent yarns is twisted and bundled, and the other The constituent yarns are non-opened and non-entangled. Further, the area indicated by D is a non-spread/non-entangled portion in which neither the constituent yarns are found to be spread or entangled.

Regarding the effects of the composite yarn of the present invention, it can be easily made into a high value-added yarn with various characteristics compared to a yarn consisting of a single twisted uneven yarn, and the constituent yarns are intertwined with each other. Since the yarn has a yarn portion that is symmetrical, uneven twisting of the constituent yarns can be made extremely difficult to reduce. That is, for example, if a yarn portion that has a twist is intertwined with other constituent yarns in an “opened state” (as is the case with the A/B portion), the yarn portion that has the twist The twist in the yarn is directly constrained by the entanglement, and changes in twist density are extremely unlikely to occur no matter what action the yarn is subjected to. Furthermore, under such a configuration, there is a twist density difference on both sides of the yarn portion having the twist along the axial direction of the yarn, and there is also a twist density difference that is originally easy to disappear due to cancellation etc. Even if the yarn portion with the difference in twist density on both sides is not directly opened and entangled, since the above-mentioned opened and entangled portion exists between them, It is difficult to equalize such a difference in twist density through the fiber opening/interlacing portion. The above has the effect that spreading and entangling has on the other yarn, but also when looking at the self-thread of a multifilament yarn, there is a difference in twist density on both sides of the yarn in the axial direction at the part where the fibers are spread and entangled. In some cases, even if there is a difference in twist density that is easily eliminated by canceling each other out, as in the case above, such a difference in twist density is made uniform through the opening/interlacing part. There is, in fact, no such thing.

As described above, the opening and entangling of the composite yarn of the present invention not only provides a coalescing effect, but also makes it extremely difficult to reduce the twist unevenness of the partner/constituent yarn. This has the effect of making it difficult to reduce twist unevenness in the yarn.

In addition, the yarn portion where both component yarns are entangled in an open state is extremely effective in coordinating the component yarns with each other.

In the present invention, it is practical for the uneven twist to be caused by alternate twisting, and this is also preferable from the viewpoint of productivity as described above.

It can be said that it is desirable that the constituent yarns have no bonding/fusion structure at all, but as long as the structure of the present invention is satisfied, there is no problem even if the constituent yarns have some bonding/fusion structure. .

In the composite yarn of the present invention, the part in the spread state does not necessarily mean the untwisted part, and especially in cases where alternately twisted yarns are constituent yarns, the constituent yarns are naturally twisted together (self-twisting). ), and in that case, it can be said that twist is present in the spread state portion due to ply twisting, alternate twisting, etc. However, even under such a structure, whether or not a certain portion of the yarn is in an open state can be easily determined by looking at the composite yarn.

In the composite yarn of the present invention, the component yarn portion of the twisted portion and the spread/entangled portion (A/B in Fig. 2)
As mentioned above, first of all, the effect is large in intertwining and coalescing the constituent yarns, and this part has the effect of twisted yarn, the yarn is soft, and the yarn is generally rounded. Furthermore, the composite yarn portion (B/B in FIG. 2) between the opening and intertwining portions is extremely effective in uniting the component yarns with each other. Further, the yarn portion shown in C in FIG. 2 also exhibits the effect of twisting by twisting one of the constituent yarns.

The composite yarn of the present invention can be manufactured by the following method.

That is, the two component yarns are aligned and engaged with an entangling device using fluid jet, and the component yarns are intertwined with each other to form a composite yarn. Here, each of the two constituent raw yarns has uneven twisting along the yarn axis, and at least one portion thereof is entangled by the fluid jet entangling device as in the case of a non-focused multifilament yarn structure. The present invention is a multi-filament yarn having yarn portions that are ready to be used.

Then, as for the yarn portions that are in a state where they can be entangled, the yarns are combined so that the portion B of the two component raw yarns is in opposite phase as shown in FIGS. 1 and 3. In a part where the thread is A or A', the other thread is B, and in each corresponding part of B and A or A', B is longer than A or A'. A combination is sufficient.

Further, the fluid jet entangling device may have a function of continuously imparting entanglement along the yarn axis of the traveling yarn, or may have a function of intermittently imparting entanglement. Furthermore, it may also have effects other than confounding.

When manufacturing the composite yarn of the present invention, the constituent fibers that can be used are as described above, but to explain the form of the constituent fibers and the embodiment of the method for producing the constituent fibers, typically This can be obtained by varying the number of false twists during false twisting of plastic multifilament yarn. Methods for varying the number of false twists include, for example, varying the pressure of the supply fluid using a fluid false twisting device, varying the rotational speed of the spindle using a spindle false twisting device, or using a friction false twisting device. There are means such as varying the state of engagement with the yarn or the yarn tension, or alternatively, varying the length of the false twisting region.

The above are representative examples of constituent fibers that can be used in manufacturing the composite yarn of the present invention, and the present invention is not particularly limited thereto.

According to the present invention as described above, by interlacing and compounding, it is possible to obtain a twisted uneven yarn having excellent properties not previously available. According to the yarn of the present invention, the texture of the twisted yarn and the unique pattern woven by yarn unevenness caused by twisting unevenness can be fully exhibited in the desired effect.

Hereinafter, the configuration and effects of the present invention will be explained in more detail with reference to Examples.

Example: Two polyester multifilament false twisted yarns (75 denier, 36 filaments) are engaged in the order of a supply roller and a fluid false twisting device, and then the two yarns are pulled together and connected to a fluid entangling device and a take-up roller. They were engaged in sequence.

The fluid false twisting device is equipped with a fluid injection hole that forms a right-handed swirling flow (as viewed in the direction of yarn travel) and a fluid injection hole that forms a left-handed swirling flow, and the direction of the swirling flow can be reversed by operating a fluid supply valve. It is something that can be done.

The fluid entangling device has a function of intermittent entangling.

The thread passing speed was 120 m/min. The direction of the swirling flow of the fluid false twisting device is reversed at 0.5 second intervals,
One fluid false twisting device was assumed to operate in reverse with a delay of 0.25 seconds relative to the other.

Also, the distance between the supply roller and the fluid false twisting device was set to 50
cm, the distance between the fluid false twisting device and the fluid entangling device is 5 cm.
And so.

The two yarns are pulled together between a fluid false twisting device and a fluid entangling device, and are divided into S-twist and non-twist, non-twist and non-twist, non-twist and S-twist, non-twist and non-twist, Z-twist and non-twist. Repeating the sequence of twisting, non-twisting and non-twisting, non-twisting and Z-twisting, and non-twisting and non-twisting, the threads are sequentially engaged with the fluid entangling device and opened at the non-twisted portion of each component yarn. intertwined, 2
The threads combine to form a composite thread.

The obtained composite yarn had a yarn structure formed by the above eight types of encounters at a period of about 2 m, and had alternate twists in the ply-twisted yarn at the same period.

[Brief explanation of the drawing]

Figures 1 and 2 are model diagrams for explaining the composite yarn of the present invention. Figure 1 is a model representation of the constituent raw yarn, and Figure 2 is the configuration of Figure 1. This is a model representation of the composite yarn of the present invention obtained from raw yarn. 1, 2: Constituent yarn, 1', 2': Constituent yarn, A: S
Twisted part, A': Z-twisted part, B: Non-twisted/unfocused part, A/B: In the yarn part where one constituent yarn is intertwined in an open state, the other constituent yarn has a twist. The thread portion is in an unspread state. B/B: Yarn portion where both constituent yarns are intertwined in an open state along the yarn axis. C: A part where one component yarn is twisted and bundled, and the other component yarn is not spread or entangled. D: A non-spread and non-entangled portion in which both constituent yarns are neither spread nor entangled.

Claims (1)

[Claims] 1 A composite yarn consisting of two constituent yarns, where both constituent yarns have uneven twisting along the yarn axis, and are intermittently intertwined in an open state along the yarn axis. Further, the composite yarn has a yarn portion along the yarn axis in which both component yarns are intertwined in an open state, and one of the component yarns is intertwined in an open state. A composite yarn characterized in that the other component yarn has a twist and has a yarn portion that is in an unspread state.