JPS6160177B2 - - 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, alternatingly twisted yarns in which S and Z twists are alternately formed are a notable example of unevenly twisted yarns.

Twisted mottled yarn is a fabric that exhibits a unique pattern created by the texture of the twisted yarn and the mottled threads caused by the mottled twist, and is highly valued for its value.

In addition, in the formation of unevenly twisted yarns, especially alternately twisted 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 period 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 if such a treatment is applied, it has almost no effect on the effect 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 fusion is stronger against the action of tension, but on the other hand, the twisting
The texture of the yarn will be impaired and the yarn will harden, making it undesirable.

In view of the deficiencies of the conventional techniques as described above, the present inventors conducted intensive research in order 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, a) both of the two constituent yarns have (a) uneven twisting along the yarn axis of the constituent yarns, and (b) and A multi-filament yarn having yarn portions that are intermittently spread and intertwined along the yarn axis, b. The composite yarn is c) Both constituent yarns are spread and intertwined along the yarn axis of the composite yarn. (d) and has a thread portion in which one of the component yarns is entangled in an open state and the other component yarn is twisted and in an unspread state; E) It is a composite yarn characterized in that both constituent yarns have individual twists and have yarn portions that are in an unspread state. That is, both of the two component yarns have the above-mentioned characteristics A and B, and on the other hand, the composite yarn has the above-mentioned characteristics C, D, and E.

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 in 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-mentioned premise, the composite yarn of the present invention is composed of two constituent yarns, both constituent yarns have uneven twisting along the yarn axis, and are twisted intermittently along the yarn axis. It is a multi-filament yarn having intertwined yarn portions in an opened state, and furthermore, the composite yarn is
Both component yarns have yarn portions that are intertwined in a spread state, and one component yarn is entangled in a spread state, and the other component yarn has a twist and is in a non-spread state. It is characterized by having a yarn portion, and also having a yarn portion in which both constituent yarns have individual twists and are in an unspread state.

To explain this composite yarn in more detail, the two multi-filament yarns constituting the composite yarn are yarns that 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.

To explain the composite yarn of the present invention in more detail with reference to the drawings, FIGS. 1 and 2 are model diagrams for explaining the composite yarn of the present invention, and FIGS.
C is a model example of each of the constituent fibers. Constituent yarn models 1 and 2 in each of FIG. There is a bundled portion B, and the non-twisted and unfocused portion B is in a state where it can be entangled when the yarn is engaged with a fluid jet entangling device. Constituent yarns 1 and 2 are
Needless to say, it is an alternately twisted yarn with uneven twisting.

Constituent yarns 1 and 2 shown in FIG. When constituent yarns 1 and 2 are aligned, A,
This is an example of a combination of constituent atoms in which B and A' are out of phase in the length direction.

In addition, the constituent yarns 1 and 2 shown in Figure 1 B and C
The pitches of A, B, and A' of each thread are random, and the length of each section is also random, and when the constituent atoms 1 and 2 are aligned, they are opposite parts. This is an example of a combination of constituent atoms that is a random combination.

FIG. 2 shows a model example of the composite yarn of the present invention, which is obtained by using the constituent atoms shown in the combinations shown in FIG. 1 (a), (b) and (c). This 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 along the yarn axis in an open state, and the area indicated by A/B is the yarn part where one of the constituent yarns is in an open state. This is the yarn part that is intertwined with the other component thread and is not spread, and the part indicated by A/A is the part where both component threads are individually twisted and are not spread. The composite yarn of the present invention is characterized by having a yarn portion in an open state, and having a yarn portion having these structures.

The composite yarn of the present invention may have a yarn portion having a structure other than these, for example, C in FIG.
There are unspread and non-entangled yarn parts where both constituent yarns are not found to be spread or intertwined, as shown in D, or where one of the constituent yarns is twisted, as shown in D. and the other component yarn is non-spreading.
There may be a portion that is a non-entangled portion.

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 twisted yarn part is intertwined with other constituent yarns in an "open state", the twisting of the twisted part is due to the entanglement. Since the yarn is directly bound, 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 opened/entangled portion. The above is opened and
This is the effect of entanglement on the mating yarn, but also when looking at the self-thread of a multi-filament yarn, if there is a difference in twist density on both sides along the axial direction of the yarn at the spread/interlace part,
Even if there is a difference in twist density that is easily eliminated by canceling each other out, as in the above case, such a difference in twist density is substantially equalized through the opening/interlacing part. There isn't.

〓〓〓〓
As described above, in the composite yarn of the present invention, opening and entangling not only have a coalescing effect but also make it extremely difficult to reduce twist unevenness of the other constituent yarns, and at the same time, the yarn itself is This has the effect of making it difficult to reduce the twist spots inside.

In the composite yarn of the present invention, the composite yarn portion between the spread and intertwined portions (B/B in Fig. 2) is extremely effective in uniting the component yarns, and the composite yarn between the twisted portions is extremely thick. It is something that has a large morphological difference from the other parts.

In addition, the composite yarn portion (A/A in Fig. 2), in which the twisted portions are combined, is S-
Whether it is a combination of S, S-Z, or Z-Z, the effect as a twisted yarn is large, and the yarn is not rounded in that part and has outstanding morphological characteristics along the yarn axis direction. It is. In addition, the composite yarn part of the twisted part and the spread/entangled part (A/
B) has a great effect in intertwining and coalescing the component yarns, and this part has the effect of a twisted yarn and the yarn is soft. The yarn in this portion has roundness, and is greatly different in form from the composite yarn portion of the twisted portions.

Further, as shown in D in FIG. 2, a portion where one of the constituent yarns is twisted and the other constituent yarn is a non-opened, non-entangled portion also has the effect of being a twisted yarn.

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 opened state does not necessarily mean the untwisted part, and especially when the constituent yarns are intertwined twisted yarns, the constituent yarns are naturally twisted together. In many cases, the fibers are in a self-twisted state, and in that case, it can be said that twist exists in the spread state portion due to ply twisting, alternate twisting, or the like. 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.

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, both of the two unformed yarns have twist irregularities along the yarn axis, and are entangled by the fluid jet entangling device as described above to form a multifilament yarn structure in which at least one portion is not bundled. It is a multi-filament yarn with yarn sections ready to be applied.

Then, as shown in A, B, and C of Figure 1,
When both component yarns are pulled together, the other component yarn side facing the portion B of the two component yarns is also the B portion, and this On the contrary, A or
It is important that there are two types of parts, one being the A' part, and that both component threads are combined and aligned so that there are parts facing each other, which become the A or A' part.

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.

In addition, when the bundled yarn portions of the component yarns are aligned in the same part along the yarn axis of the component yarns, the composite yarn is processed using a device that has the function of continuously intertwining the component yarns. Even if a
It may also be intermittently confounded.

When aligning the constituent yarns, both constituent yarns or one of the constituent yarns may be prepared as a package, or they may be continuously introduced from the process of manufacturing the constituent yarns.

When manufacturing the composite yarn of the present invention, the constituent yarns that can be used are as described above, but the forms of the constituent yarns and the embodiments of the manufacturing method of the constituent yarns are classified and explained as follows. Become.

In other words, uneven twisting can be classified into those caused by alternate twisting and those caused by unidirectional twisting.
(1): Alternate twisting: (1)−(1): Thermoplastic multifilament yarn at high temperature,
Obtained by false twisting with a spindle or fluid under low tension. The yarn is repeatedly twisted alternately in the order of an untwisted part, a non-twisted part, an overly untwisted part, and a non-twisted part. and,
At that time, this can be obtained by setting the false twisting temperature to such a level that the non-twisted portions do not fuse.

(1)-(2): Obtained by varying the number of false twists during false twisting of thermoplastic multifilament yarn. Methods for varying the number of false twists include:
For example, using a fluid false-twisting device to vary the pressure of the supply fluid, or using a spindle false-twisting device to vary the rotational speed of the spindle.
There are means such as using a friction false twisting device to vary the engagement state with the yarn or the yarn tension, or alternatively, varying the length of the false twisting region.

The yarn has a gentle twist pattern, and the twist pattern is generally long.

(2): Unidirectional twist (2)-(1): Obtained by varying the yarn speed when twisting multifilament yarn with a twisting machine. At that time, this can be obtained by making the yarn substantially non-twisted at the highest yarn speed portion.

(2)-(2): Making the over-untwisted part substantially untwisted by additionally twisting the false-twisted multifilament yarn with weak alternating twists to the degree of fusion in the twisting direction of the untwisted part. What can be obtained by

etc.

Each of the above is a representative example of the constituent yarn 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 substances that could not be obtained conventionally. According to the yarn of the present invention, the texture of the twisted yarn and the unique pattern woven by the various irregularities caused by the uneven twisting 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 Melt spinning polyethylene terephthalate,
A multifilament yarn of 120 denier, 36 filaments, and a natural draw ratio of 1.66 was produced by drawing at 3000 m/min.

Next, the yarn was subjected to a false twist number of 3200T/m and a heating temperature.
False-twisted at 230℃ and stretching ratio 1.42, 500
It was picked up at m/min.

Subsequently, following the above steps, the two yarns that had been falsely twisted using two spindles were pulled together, engaged with a fluid entangling device, and pulled at a speed of 500 m/min.

The false twisting device used was both a three-axis circumscribed friction false twisting device and a two-belt cross contact friction false twisting device, and the desired false twisting process was achieved in both cases.

The fluid entangling device has a function of intermittent entangling at a period of about 15 mm.

As shown in Fig. 2, the obtained composite yarn is intermittently intertwined as a whole, and in the intertwined parts, both component yarns are opened and entangled, and one is opened and entangled. On the other hand, the fibers may be twisted and bundled and not opened.

In the unentangled part, there are cases in which both constituent yarns are twisted and bundled, cases in which both constituent yarns are in a spread or non-spread state, and cases in which one constituent yarn is twisted and bunched in the other. The constituent yarns were either spread or unspread.

Further, the composite yarn had a ply-twisted alternating twist.
When tension was applied to this composite yarn, the alternating twist of the ply-twisted yarn decreased and changed, but the twist structure of the constituent yarns hardly changed.

In addition, the constituent raw yarn subjected to the above false twisting process is
The untwisted portions of the S-twist and the over-untwisted and substantially untwisted portions of the Z-twist were randomly arranged in various lengths.

[Brief explanation of the drawing]

Figures 1 and 2 are model diagrams for explaining the composite yarn of the present invention, and Figure 1 A, B, and C are constituent yarns that can be used to obtain the composite yarn of the present invention. FIG. 2 is a model illustrating the composite yarn of the present invention. 1: Constituent yarn model, 2: Constituent yarn model,
1': Constituent yarn, 2': Constituent yarn, A/B: One configuration〓〓〓〓
The yarns are intertwined in a spread state, and the other constituent yarn has a twist and is in an unspread state. A/A: Both constituent threads have individual twists and are in an unspread state. A certain yarn section, B/B: A yarn section where both constituent yarns are spread and intertwined along the yarn axis, C: Neither constituent yarns are found to be spread or intertwined. Non-spread/non-entangled yarn portion, D: Yarn portion where one component yarn has a twist and the other component yarn is a non-spread/non-entangled portion. 〓〓〓〓

Claims (1)

[Scope of Claims] 1. A composite yarn consisting of two component yarns, wherein: (a) both of the two component yarns (a) have twist irregularities along the yarn axis of the component yarns; and (b) and the yarn. A multi-filament yarn having yarn portions that are intermittently intertwined in a spread state along the axis, b) The composite yarn is a multi-filament yarn that has thread portions that are intertwined in a spread state along the yarn axis of the composite yarn; It has an intertwined thread part, (d) and it has a thread part in which one of the constituent yarns is intertwined in a spread state and the other constituent thread is twisted and not in a spread state, and (e) and Further, a composite yarn characterized in that both component yarns have individual twists and have yarn portions that are in an unspread state.