JPS6015737B2 - Manufacturing method of special composite bulky yarn - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a special composite bulky yarn having a two-layer structure that has a spun-like feel and feel.

Recently, the demand for spun-like processed yarn has been increasing day by day, and it is firmly establishing itself as one of the major materials in line with fashion trends of vigorous diversification and individualization. For this purpose, filament yarns of thermoplastic synthetic fibers have been fluffed mechanically or chemically and fluidly to meet the requirements for so-called spunlike materials as pseudo-spun yarns. be.
However, in this method, in order to obtain a sufficient spun-like effect, a strong fluffing action must be imparted to the filament yarn, resulting in the problem of yarn breakage during processing.
Furthermore, it is well known in the art that there are considerable inherent difficulties such as the problem of uniformity of the fluffing effect. On the other hand, if the fluffing effect is suppressed, the problem of workability can be solved, but it goes without saying that a sufficient spun-like effect cannot be obtained. Other apps that solve these difficulties.

One method is to directly use spun yarn to obtain a spun-like effect, and then combine it with drawn thermoplastic filament yarn to obtain properties that combine the texture of spun yarn and the uniformity of filament yarn. It's been getting worse. Specifically, a method is used in which a spun yarn and a thermoplastic filament yarn are combined, or a method in which a spun yarn and a thermoplastic filament yarn are simultaneously false-twisted and then combined and combined. In particular, the latter method of simultaneously false-twisting the spun yarn and thermoplastic filament yarn is a preferable method in terms of the texture of the product, especially its high properties, but this method still has one problem. . That is, there is a difference in heat shrinkage behavior between spun yarn and thermoplastic filament yarn during heat setting during false twisting. That is, in general, spun yarns do not show shrinkage or elongation behavior during heat setting during false twisting, and no significant change in yarn length is observed, but drawn thermoplastic filament yarns generally exhibit overfeed during false twisting. '
This causes a corresponding shrinkage behavior, and as a result, a difference in yarn length appears between the two in the finished processed yarn, causing various troubles in subsequent processes, such as the weaving preparation process or the rope setting process. It has been known. For this reason, the common method in the industry is to set a difference in the feeding speed of spun yarn and thermoplastic filament yarn in advance, and use this difference to eliminate the difference in yarn length that would occur in the steady method. be. [For example, Tokuseki Publication No. 49-26555, Tokuseki No. 52-4064
[Refer to Publication No. 3] However, in order to create a difference in the feeding speed of the two yarns, it is necessary to use two V-feed roller systems or a stepped feed roller system, which is wasteful in terms of equipment. It cannot be denied that it is complicated in terms of workability.
Therefore, there has been a demand in the industry for the possibility of simultaneous false twisting of spun yarn and thermoplastic filament yarn using a single roller system. The present inventors have searched for a specific and highly practical method to meet this demand in the industry, and as a result, we have developed highly oriented undrawn thermoplastic synthetic multifilament yarn as a material for simultaneous processing with spun yarn. In particular, the present invention was achieved by discovering that this kind of requirement can be met by using a highly oriented polyester end-drawn yarn.

That is, in the present invention, a spun yarn made of short fibers of natural fibers or thermoplastic synthetic fibers and a highly oriented undrawn polyester yarn are drawn together by the same supply roller and guided to a false twisting and crimping process, thereby producing the former. This is a method for producing a special composite bulky yarn with a two-layer structure, characterized in that the latter is used as a core yarn and heat-set in a covering state.

Regarding this, the present inventors have found that the so-called easy-to-stretch property of the highly oriented undrawn polyester yarn has a very favorable effect when false-twisting it simultaneously with the spun yarn.

In other words, highly oriented undrawn polyester yarn can exhibit elongation or contraction behavior commensurate with the behavior of the spun yarn of the combined material, and therefore, in contrast to the spun yarn, the yarn length of the composite bulky yarn as a product can be increased. It is possible to obtain a composite textured yarn that exhibits an extremely uniform appearance without causing any difference in texture. If a general drawn yarn is used, the elongation characteristics are originally low, and the shrinkage behavior is in the direction of a more stable yarn structure, so when it becomes a composite yarn, a difference in yarn length will occur, but it is highly oriented. If an undrawn yarn is used, it will have a sufficient stretching surplus, so it will rather pass through a long yarn path during the false twisting process. Therefore, it is possible to false twist the spun yarn in such a manner that the core yarn is coated with the spun yarn. Therefore, the completed composite yarn becomes a uniform yarn with almost the same yarn length. Next, the present invention will be explained according to the drawings. Fig. 1 shows a basic embodiment of the present invention, in which 1 is a highly oriented undrawn polyester yarn, and 2 is a spun yarn as a combination material. It's a thread.

3 is a guide for traversing these yarns, 4 is a V-feed roller system, 5 is a normal temporary combustion heater, 6. is a false twisting spindle, 7 is a delivery roller system, and 8 is a winding section.

Fig. 2 also shows that compressed fluid is applied between the delivery roller system and the winding section of the false twist shown in Fig. 1 in order to ensure the binding of processed yarn as a product. The yarn binding device 9 used in this example is provided. The yarn binding device 9 does not need to have a special form as long as it provides binding properties for the constituent materials;
It has been confirmed that the nozzle shown in the publication is sufficiently effective for this purpose. FIG. 3 shows a model of the appearance of a textured yarn obtained when a normal yarn combination not according to the present invention, that is, a spun yarn and a drawn thermoplastic synthetic multifilament yarn are false-twisted at the same feeding speed. This figure shows a state in which the two spun yarns do not exhibit satisfactory shrinkage behavior, resulting in a difference in yarn length, resulting in slack in the spun yarns during processing. It is easily understood that yarns of this type are extremely difficult to handle during the preparation process for weaving. FIG. 4 is a model diagram of the external appearance of processed yarn obtained when, for example, highly oriented polyester undrawn yarn and spun yarn are passed through a false twisting process at the same feeding rate according to the present invention. It was shown that there is no difference in the yarn length regardless of the processing at the same feeding rate, and the spun yarn enters the inner layer and covers the spun yarn as the highly oriented undrawn polyester yarn stretches. ing. When the yarn tying means is applied after processing as shown in FIG. 2, it can be seen that the yarn form of FIG. 4 is partially tightly woven as shown in FIG. Regarding the combination of coarse materials of the present invention, any spun yarn can be selected.

As the highly oriented undrawn yarn of the thermoplastic synthetic multifilament yarn as a combination material, a polyester-based highly oriented undrawn yarn is particularly suitable, and from the point of view of elongation behavior, 0.0
Those having a birefringence of 2 to 0.15 are most practical. When selecting a spun yarn, for example, a spun yarn made of wool, a highly shrinkable thermoplastic synthetic fiber, or a spun yarn made of a blend thereof should have a two-layer structure to exhibit more core properties during false twisting. It is possible to obtain a uniform composite yarn with strong strength and extremely well-balanced yarn length. In addition, in the case of spun yarn made of cotton or spun yarn made of a blend with cotton, the spun yarn does not shrink much, so when false twisting is carried out simultaneously with ordinary drawn yarn, the difference in yarn length becomes particularly large. However, if a polyester-based highly oriented undrawn yarn is used as in the present invention, a satisfactory composite yarn can be obtained even in such a case due to the filament adjustment properties of the highly oriented undrawn yarn. The negative effects of using general drawn yarn have already been mentioned several times, but when so-called undrawn yarn is used, it is important to note that in combination with any spun yarn, the undrawn yarn can be used up to an appropriate level. It is impossible to apply drawing to the filament, and it is completely impractical to use a drawn yarn as a filament component in the present invention.

In addition, in order to obtain a two-layer structure as shown in Figure 4, the relationship between the thickness of the spun yarn and the filament yarn is also important.
s, when the denier of filament yarn is DF, 0. Arc S≦DF≦4. It is preferable that the relationship S is satisfied.

DF is 0. If it is lower than mark S, the coating effect will not be complete, and
．． When the value is higher than 0Ds, the characteristics of the spun yarn disappear. Ta
As described above, according to the present invention, in the composite false twisting of spun yarn and filament yarn, since the filament yarn and highly oriented undrawn polyester yarn that exhibits special thermal behavior during false twisting are used, they are simply pulled together. It can be processed just by arranging it, which is extremely advantageous in terms of equipment and workability.

In addition, the resulting composite yarn has a spun yarn as a core and is surrounded by filament yarn evenly, making it of high quality, and also exhibits the feel of fine wool due to the unique properties of the filament yarn. Example 1 In the process shown in Figure 2, polyester highly oriented undrawn yarn 11 matrix e-3 leg 1 was used as 1, and 100% polyester spun yarn 60S was used as spun yarn 2. False twisting was carried out under the false twisting conditions shown in the table.

False twisting processing conditions Number of twists 2. Female IT/M 1st overfeed -9.1% heater temperature
215oo ta Twisting tension (T,
) 14 Untwisting tension (L)
50 thread speed
12 h/min As a result, the obtained yarn has a two-layer structure, as shown in Fig. 4, with the spun yarn 2 as a core and the periphery of the spun yarn 1 as a highly oriented undrawn yarn. It showed a thread form.

When this obtained yarn was given a post-twist number of 18/M and used in textile applications, it not only had a spun-like texture, but also an extremely flowing texture, which was probably caused by the highly oriented undrawn polyester yarn on the surface. It showed the texture. However, in order to apply it to the knitting process, it is difficult to use it as it is, so a so-called interlacing process is added following the false twisting process to create a yarn with the form shown in Figure 5. I got it.

A locally intertwined structure is obtained, and in this state, the two layers will not separate even if a considerable amount of stress is applied, and exhibits sufficient process mability in the knitting process. In terms of handleability, it could be used not only as a yarn but also as a textile, even without the addition of post-twisting, unlike those without interlacing. The interlacing conditions in this case were an overfeed rate of 2% and a compressed air pressure of 4.5k9/G. Example 2 In the process shown in FIG. 2, a polyester highly oriented undrawn thread pine insect e-father crucian carp itself was used as the spun yarn of 2, and a polyester spun yarn of 40'S was used as the spun yarn of 2. False twisting and interlacing were performed under twisting conditions.

False twisting processing conditions Number of twists: 1.51 phantom/M 1st overfeed -9.1% interlace 0
．． F +2.0% winder〇F
5.7% heater temperature
215 pm Twisting Tension
As a result, as shown in Fig. 5, the resulting yarn consists of the spun yarn 1 as a whole, which constitutes the core, and the highly oriented non-polyester. The drawn yarn 2 surrounds the outer periphery, and the parentheses and the highly oriented undrawn polyester yarn are locally intertwined with the spun yarn, or the highly oriented drawn yarn is intertwined with each other, and has considerable east-gathering properties. The woven and knitted fabrics, which were produced without any problems in handling for both woven and knitted fabrics, exhibited not only the texture of spun yarn, but also the unique rare wool-like texture of highly oriented, drawn yarn.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the basic steps of the present invention. FIG. 2 shows an embodiment in which an interlacing process is juxtaposed in addition to the basic process. FIG. 3 is an external view of a yarn obtained when a conventional normally drawn yarn and a spun yarn are aligned and processed at the same time, and FIG. FIG. 5 is an external view of the yarn obtained when the yarn is simultaneously drawn and processed, and FIG. 5 is an external view of the yarn obtained when the interlacing process is successively carried out as shown in FIG. O leg strength 2 bait O 319 Ki 4 sparrow; fungus

Claims (1)

[Claims] 1. By guiding spun yarn made of short fibers of natural fibers or thermoplastic synthetic fibers and highly oriented undrawn polyester yarn to a false twisting and crimping processing area using the same supply roller in a state where they are aligned. A method for producing a special bulky yarn having a two-layer structure, characterized in that the former is used as a core yarn and the latter is heat-set in a covering state to cover its periphery. 2. Claims characterized in that, when the denier number of the spun yarn is converted into denier as D_S, and the denier of the highly oriented undrawn polyester yarn is D_F, the relationship between the two is regulated by the following formula: A method for producing the special composite bulky yarn according to item 1. 0.5D_S≦D_F≦4.0D_S 3 Polyester highly oriented undrawn yarn is 0.02 to 0.1
A method for producing a special composite bulky yarn according to claim 1, characterized in that the yarn has a birefringence index of 5. 4. The method for producing a special composite bulky yarn according to claim 1, wherein the spun yarn is made of wool. 5. A method for producing a special composite bulky yarn according to claim 1, characterized in that the spun yarn and the highly oriented undrawn polyester yarn are guided to a false twisting and crimping processing area by the same supply roller in an aligned state. . 6 The spun yarn made of short fibers of natural fibers or thermoplastic synthetic fibers and the highly oriented undrawn polyester yarn are guided to the false twisting and crimping processing area using the same supply roller in a state where they are aligned, so that the former is used as the core yarn and the latter is The periphery is heat-set in a covered state, and the two-layer structure yarn after untwisting is subjected to an interlacing treatment, thereby imparting a cohesive property characterized by intertwining the spun yarn and filament yarn. , a method for producing a special composite bulky yarn with a two-layer structure.