JPH09316741A - Special composite false-twisted yarn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a special composite false-twisted yarn having clear and non-slipped slub parts and crimped ground parts and giving a woven or knit fabric having new excellent appearance and touch, when woven or knitted. SOLUTION: This composite false-twisted yarn is produced by singly or triply winding at least one multifilament yarn B (yarn B) on the periphery of at least one multifilament yarn A (yarn A) and subsequently again singly or triply winding at least one multifilament yarn C (yarn C) on the periphery of the formed textured yarn to randomly form doubly, quadruply and sextuply wound parts comprising the yarns B, C on the yarn A as the whole body of the composite false-twisted yarn. The quadruply wound parts have parts having the crimped yarn A and parts not having the crimped yarn A, and at least one of the yarns B and C comprises single filaments each having a cross section in which a depressed part is formed between the adjacent two pro jections. The twisting direction of the outermost layer at each wound part of the composite false-twisted yarn is the same as the twisting direction of the doubly wound part at the quadruply wound part in which the yarn A is not crimped, and is reverse at the quadruply wound part and the sextuply wound part in which the yarn A is crimped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a special composite which has a clear and non-shifted slab portion and a crimped ground portion, and when knitted or knitted, a fabric having an unprecedented excellent appearance and texture is obtained. It relates to false twisted yarn.

[0002]

2. Description of the Related Art A woven or knitted fabric using a yarn having a slab is characterized by its appearance and feeling and is widely used. As an example of a yarn having a slab, Japanese Patent Publication No. Sho 62-21887 discloses that when a yarn (core yarn) is false twisted, it has a dry heat shrinkage ratio of 3% or more larger than that of the core yarn in the twisting region. There has been proposed a special entangled yarn in which a slab is fixed to a core yarn and is obtained by supplying a yarn (wrapped yarn) and performing a composite false twisting process.
However, although this special entanglement yarn has a slab formed by winding yarn having a dry heat shrinkage ratio that is 3% or more higher than that of the core yarn, the sheath yarn is 1 or 3 times as thick as the core yarn. It is not a clear slab because it is only wound, but when it is made into a woven or knitted product, the slab becomes unclear, and there is a drawback that the morphological change is poor.

Further, in Japanese Examined Patent Publication No. 1-20254, a double layer, a double layer, and a double layer obtained by false twisting at least three kinds of yarns at the same time are disclosed.
A composite fancy yarn having double and six-fold winding portions has been proposed. In this composite fancy yarn, the yarn on the sheath side is wound twice, four times, and six times with respect to the yarn arranged on the core side.
As shown in, the number of yarns to be wound is simply increased by one and the three yarns are simultaneously false twisted. Moreover, since there is no crimp in the core yarn, there is little change. The slab effect could not be emphasized even when weaving and knitting. Furthermore, since the slab (wrapping part) is not fixed, there is a drawback that a nep occurs due to the displacement of the slab during weaving and knitting.

[0004]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned drawbacks, and the cloth obtained by weaving and knitting has clear and various slab portions, and gives a feeling of spots, a feeling of span tone and a feeling of swelling. The technical issue is to provide a special composite false-twisted yarn that can impart a unique sharpness and has no deviation in the slab portion.

[0005]

The present inventors have arrived at the present invention as a result of extensive studies to achieve the above-mentioned objects. That is, according to the present invention, at least one multifilament yarn A (yarn A) is wound around at least one multifilament yarn B (yarn B) around a single or triple wound processed yarn. , At least one multifilament yarn C (yarn C) is wound single or triple, and as a whole, the yarn A is doubled by the yarns B and C with respect to the yarn A.
The 4-fold and 6-fold winding parts are formed at random, and the 4-fold winding part has a part where the yarn A has crimps and a part which does not have crimps, and At least one of them is a composite false twisted yarn which is a yarn composed of a single yarn having a cross section in which a concave portion exists between two adjacent convex portions,
The twist direction of the outermost layer of each winding part of the composite false-twisted yarn is the same in the quadruple winding part in which the yarn A has no crimp with respect to the double winding part, and in the twisting direction of the yarn A. The gist is a special composite false-twisted yarn characterized in that the quadruple wound portion and the six-fold wound portion that are provided are in opposite directions.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view showing an embodiment of the special composite false twisted yarn of the present invention, FIG. 1 (a) is a side view, and FIG.
(B) shows the winding state of the yarns B and C with respect to the yarn A, and the positions of FIGS. 1 (a) and 1 (b) correspond to each other.

In FIG. 1, the yarn B is wound around the yarn A in a single layer in the regions (a) and (d), and the yarn A in this region is crimped by untwisting. And have swelling. In the regions (b) and (c), the yarn B is triple-wound on the yarn A. Since this portion is not untwisted by strong winding, the yarn A is crimped. I do not have. On the other hand, the yarn C is single-wound in the regions (a) and (b) with respect to the false twisted yarn formed by the yarns A and B,
In the regions (c) and (d), triple winding is performed.

That is, in the whole yarn, a double winding portion is formed by the yarns B and C in the region (a) with respect to the yarn A, and the triple winding of the yarn B is formed in the region (b). One thread C at the turn
A quadruple winding portion is formed by heavy winding, and conversely, in the region (d), the single winding portion of the yarn B has the yarn C
Are triple-wound to form a quadruple-wound portion.

In the latter quadruple winding part, the yarns B and C are wound on the portion having the bulge due to the crimping of the yarn A, so that it is compared with the former quadruple winding part. Has a bulge. Further, in the area (C), the yarn C is triple wound around the triple wound portion of the yarn B to form a 6-fold wound portion.

The twist direction of the outermost layer of each winding portion of the special composite false twisted yarn of the present invention is such that the triple winding portion of the yarn B is different from the double winding portion of FIG. The quadruple winding part (b), which is the portion in which the yarn C is wound around the single layer, is overtwisted in the same direction, and conversely, the single winding of the yarn B is performed. In the quadruple winding part (2), which is the part in which the yarn C is triple wound around the portion, and in the part in which the yarn C is triple wound around the triple winding part of the yarn B. A certain six-fold winding portion (c) is not untwisted because of strong winding due to the reversal of the twist, and is in the opposite direction. That is,
With respect to the double winding part, the twisting direction of the outermost layer of each winding part is the same for the quadruple winding part where the yarn A has no crimp, and the quadruple winding where the yarn A has crimp. The turn and the six-fold turn are in opposite directions.

Further, in the special composite false twisted yarn of the present invention, at least one of the yarns B and C is a yarn composed of a single yarn having a special cross section. In the present invention, the special cross section means that there is a concave portion between two adjacent convex portions such as a cross shape in FIG. 2 (a), a trilobal shape in FIG. 2 (b), or a 5-10 leaf cross section. What you do. By knitting and weaving a composite yarn containing a yarn composed of a single yarn (a special cross-section yarn) having such a cross section, it is possible to obtain a cloth with a sharp feeling that cannot be obtained by using an ordinary round cross section yarn. In particular, if a special cross-section yarn having a sharp convex portion is used, the sharpness can be further emphasized.

Further, as described above, since at least one of the yarns B and C is a yarn composed of the special cross-section yarn, the slab portion (each winding portion) can be made difficult to shift. . FIG. 3 is a diagram for explaining that the slab portion (each winding portion) of the special composite false twisted yarn of the present invention is hard to be displaced. FIG.
(A) is a cross-section yarn and round cross-section yarn, Fig. 3 (b) is an example in which cross-section yarns are in contact with each other. In either case, the contact area between single yarns is large, and Since the single yarns are held in the recesses, the yarns do not slip easily, and the slab as a whole has a structure that is extremely unlikely to slip. Furthermore, FIG.
In the case where the yarn axes are in contact with each other as shown in (c), the contact area increases due to the deformation of the special cross-section yarn, and the repulsive force to return to the original and the pressing due to the winding of the slab portion Since they work with each other, they form a slab that is hard to slip like the former.

The special cross-section yarn may be used for either of the yarns B and C. If it is used for the yarn B, the yarn B is located between the yarn A and the yarn C, so that the deviation of the slab portion is prevented. The effect is improved and the yarn C is exposed at random from the gaps of the yarn C in the single winding portion of the yarn C, that is, in the areas (a) and (b) of FIG. It can express a sharp feeling. On the contrary, if the yarn C is used as the yarn C, the yarn C is located in the outermost layer of the special composite false-twisted yarn, so that it is possible to obtain a woven / knitted fabric having a unique sharpness which is rich in variation that has never been seen before. Further, if the special cross-section yarn is used for both the yarns B and C, the effect of preventing the deviation of the slab portion is improved and a woven or knitted fabric having a unique sharpness can be obtained.

As described above, the special composite false twisted yarn of the present invention is
Double winding part with bulge and yarn A are untwisted and quadruple winding part with bulge, yarn A is not untwisted 4
Since the heavy winding portion and the 6-fold winding portion are formed at random, it is possible to give a slab effect with a great variety to the cloth obtained by weaving and knitting. Moreover, since the false twist crimp is applied to the yarn A which is the core yarn, the soft and swelling span-like feeling can be expressed, and the yarn B,
By using the special cross-section yarn for at least one of C, the deviation of the slab portion is eliminated, and it is possible to give an unprecedented unique sharpness due to the varied slab portion. Further, by using a special cross-section yarn having a convex portion with an acute angle, it is possible to obtain a woven or knitted fabric with a sharper feeling.

As the yarns A, B and C constituting the special composite false twisted yarn of the present invention, any material may be used as long as it is a thermoplastic synthetic fiber such as polyamide or polyester. As the yarn fineness, the yarn A which is the core yarn of the false twist winding yarn
It is preferable that the yarn B to be the wound yarn is smaller, and the fineness of the yarn C is smaller than that of the yarn B.

Next, an example of a method for producing the special composite false twisted yarn of the present invention will be described. FIG. 4 is a schematic process drawing showing an example of a method for producing the special composite false twisted yarn of the present invention. In FIG. 4, the yarn A is
The yarn is fed from the package to the first false twisting region by the yarn feeding roller 1, and a series of false twisting processes are performed by the first heater 4, the spinner 5, and the first take-up roller 6. At that time, the yarn feeding roller 2 The yarn B pulled out from the package is supplied to the twisting region of the yarn A through the guide 3, preferably in an overfeed state perpendicular to the yarn axis. And the yarn B is
While being wound around the yarn A by the turning force of the yarn A, it vibrates up and down due to the fluctuation of the winding tension, and as shown in FIG. A triple winding portion is formed.

After this, the untwisting operation is performed in the untwisting region,
The heavy winding portion is not untwisted due to the strong winding due to the reversal of the twist of the yarn B, and has a twist in the same direction as the twisting direction, as shown in FIG. 5B. . On the other hand, the yarn B in the single wound portion has a twist in a direction opposite to the twisting direction due to overtwisting, and the yarn A is given a bulge due to crimping. Immediately after passing through the first take-up roller 6, the false twist winding yarn has the above-mentioned single winding portion and triple winding portion alternately with a random length.

Subsequently, the false-twisted yarn that has passed through the first take-up roller 6 is subjected to the second false-twisting process by the second heater 9, the spinner 10, and the second take-up roller 11. At this time, Yarn C drawn from the package by the yarn feeding roller 7
Is supplied to the twisted area of the false twist wound yarn via a guide 8, preferably in an overfeed state. At this time, the yarn C oscillates up and down due to the fluctuation of the winding tension while being wound around the false twist winding yarn by the turning force of the false twist winding yarn which is the core yarn, as shown in FIG. 5 (c). As described above, the false twisted yarn is wound in a single or triple layer, and the yarn as a whole is composed of the yarn A, the yarns B and C being double, quadruple, and hexaplexed. To form.

After that, the yarn C is unwound and then wound into the winding package 12. The yarn C is triple-wound around the 6-fold winding portion and the single winding portion of the yarn B. The part is not untwisted and has a twist in the same direction as the twisting direction, as shown in FIG. On the other hand, the portion where the yarn C is single-wound around the double-wound portion and the triple-wound portion of the yarn B is over-twisted and has a twist in the direction opposite to the twisting direction. That is, referring to FIG. 1, the twisting direction of the outermost layer of each winding part is the same as that of the quadruple winding part (b) where the yarn A has no crimp, as compared to the double winding part (a). In the direction, the quadruple wound portion (d) and the six-fold wound portion (c) in which the yarn A has a crimp are in opposite directions.

The special composite false-twisted yarn of the present invention can be manufactured, for example, by using the manufacturing method as described above and adopting the special cross-section yarns for the yarns B or C or both the yarns B and C. it can.

[0021]

The special composite false twisted yarn of the present invention has a double wound portion having a bulge and two kinds of slabs having different thicknesses.
Since the double winding portion and the six-fold winding portion are randomly provided and a special cross-section yarn is used for at least a part of the winding yarn, a clear and various slab portion is obtained in the fabric obtained by weaving and knitting. It is possible to express the feeling of spots, swelling, and span tone, as well as to give a unique sharpness. Further, the shape of the special cross section yarn and the repulsive force due to the deformation can prevent the slab from being displaced.

[0022]

Next, the present invention will be described in detail with reference to examples. The slab displacement was evaluated by the following method. While mating two commercially available satin washers in the opposite direction,
Thread the marked slab over the quadruple winding portion and the six-fold winding portion surrounded by the double winding portion and the next double winding portion, and pass 1/30 g of the actual fineness. 3m with a load of (gram)
The vehicle was run at a speed of / min and the deviation of the mark part after passing the washer was observed. Each measurement was performed at 10 points, and the number of moved slabs and the deviation rate shown in the following equation were used for evaluation. Deviation rate (%) = [(X−Y) / X] × 100 where X is the length of the slab before running and Y is the length of the slab after running.

Example 1 Polyethylene terephthalate (PET) drawn yarn having a round cross section of 100d / 48f as the yarn A, and FIG. 2 as the yarn B.
75d / 10f PE having a cross section as shown in (a)
T stretched yarn, P having a round cross section of 50d / 24f as yarn C
The ET drawn yarn was processed under the following conditions by using the false twisting device shown in FIG. 4 to obtain the special composite false twisted yarn of the present invention. Spindle speed 12.5 × 10 ⁴ rpm False twist number of spinner 5 Z-2500T / M False twist number of spinner 10 S-2000T / M Feed rate of yarn A 7% Feed rate of yarn B 80% Yarn Feed rate of C 72% First heater temperature 200 ° C Second heater temperature 200 ° C The deviation of the slab part of the obtained yarn was evaluated, but out of 10 points, there was no deviation and the morphological stability was extremely good. It was a thing.

This yarn is used for the warp yarn and the weft yarn, and the warp yarn density is 70 yarns / 2.54c by using a water jet loom.
Weaving was a plain weave with m and weft density of 45 threads / 2.54 cm. The resulting woven fabric was rich in morphological changes due to the random thickness unevenness of the slab, and had a soft and swelling span touch and a subtle sharpness, giving it an unprecedented texture. In addition, there was no nep in the preparation and weaving process, and weavability was good.

Example 2 75d / 36f PET stretched yarn having a round cross section as the thread B, and 50d / 10f PET having a cross section as the thread C
The special composite false twisted yarn of the present invention was obtained by performing the same processing as in Example 1 except that the drawn yarn was used. As a result of evaluating the slab portion of the obtained yarn by the above-mentioned method, one of the 10 slabs was displaced, but the displacement rate was as small as 9% and it did not become a nep shape.

Further, when this yarn was woven under the same conditions as in Example 1, the obtained woven fabric was rich in morphological changes, and in addition to the soft and swelling span touch, the strength of the slab changed randomly because of its random appearance. It was given a rich sense of sharpness. Furthermore, no nep was generated during the above-mentioned preparation and weaving processes, and the weavability was good.

Comparative Example 1 75d / 36f PET stretched yarn having a round cross section as the yarn B, and yarn C having the triangular cross section as shown in FIG. 6 as the yarn 50.
A composite false-twisted yarn was obtained by performing the same processing as in Example 1 except that PET drawn yarn of d / 12f was used. As a result of evaluating the slab portion of the obtained yarn by the above method, 8 out of 10 points
The slabs at the points were misaligned, and the misalignment rate was as large as 45 to 88%, and especially those with 70% or more were nep-shaped.

When this yarn was woven under the same conditions as in Example 1, the obtained woven fabric was rich in morphological change due to the random thickness unevenness of the slab and had a soft and span-like texture. 、 I didn't feel sharp. further,
Weaving was inferior due to the large number of neps generated on the non-nozzle side of the water jet loom.

Comparative Example 2 Using the same yarn as in Example 2, processing was performed under the following conditions according to the false twisting process shown in FIG. Spindle speed 12.5 × 10 ⁴ rpm Spinner 5 false twist number Z-2500T / M Yarn A feed rate 7% Yarn B feed rate 80% Yarn C feed rate 72% First heater temperature 200 ℃ 2nd heater temperature 200 ℃ As a result of evaluating the deviation of the slab part of the obtained yarn by the above-mentioned method, the slab was deviated at 2 points out of 10 points.
It was as small as 11% and 14%. However, when this yarn was woven under the same conditions as in Example 1, the obtained woven fabric had little morphological change, and although it had a crisp feeling, it was no different from the conventional woven fabric. Further, compared with the woven fabrics of Examples 1 and 2, the texture was coarse and hard, and the swelling feeling was also inferior.

[0030]

The special composite false-twisted yarn of the present invention has substantially three kinds of slabs having random thickness irregularities and bulges formed by the yarn including the special cross-section yarn. It is possible to add a variety of forms to the knitted fabric, a span-like feel with a soft and swelling feeling, and a variety of crispness that has never been seen before. Moreover, since the deviation of the slab itself is eliminated due to the characteristics of the special cross-section yarn, no nep occurs during knitting and weaving, and it is possible to achieve economical effects and work efficiency by reducing defects.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of a special composite false twisted yarn of the present invention, in which (a) is a side view, (b) shows a wound state of yarns B and C with respect to yarn A, The positions of a) and (b) are shown to correspond.

2 (a) and 2 (b) are cross-sectional views showing an embodiment of a special cross-section yarn constituting the yarn B and the yarn C in the present invention.

FIG. 3 (a) is an explanatory view showing a state where a special cross-section yarn and a round cross-section yarn are in contact with each other in the same axial direction in the special composite false twisted yarn of the present invention, and FIG. FIG. 3C is an explanatory view showing a state in which the special cross-section yarn and the round cross-section yarn are in contact in different axial directions.

FIG. 4 is a schematic process drawing showing an example of a method for producing a special composite false twisted yarn of the present invention.

FIG. 5 (a) is an explanatory view showing the state of the yarn in the twisting region of the first false twisting process, and FIG. 5 (b) shows the state of the yarn in the untwisting region of the first false twisting process. Explanatory drawing shown, (c) is explanatory drawing which shows the state of the yarn in the twisting area | region of a 2nd false twist process.

FIG. 6 is a cross-sectional view showing a conventional triangular cross-section yarn.

FIG. 7 is a schematic process diagram showing a conventional method for producing a composite false twisted yarn.

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Claims (1)

[Claims] 1. At least one multifilament yarn C surrounds at least one multifilament yarn A. At least one multifilament yarn B surrounds a single or triple wound processed yarn. The multifilament yarns B and C are used for the multifilament yarn A to form a double, quadruple, and double winding.
The heavy winding portions are randomly formed, and the multi-filament yarn A has crimped portions and non-crimped portions in the quadruple wound portion, and the multifilament yarns B,
At least one of C is a composite false twisted yarn which is a yarn made of a single yarn having a cross section in which a concave portion exists between two adjacent convex portions, and each winding portion of the composite false twisted yarn is The outermost layer is twisted in the same direction as the quadruple winding part in which the multifilament yarn A has no crimp with respect to the double winding part, and in the quadruple winding part in which the multifilament yarn A has crimps. A special composite false-twisted yarn characterized in that the six-fold winding portion is in the opposite direction.