JP3483340B2 - Stretch composite yarn having warp knitting structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stretchable composite yarn. More specifically, the present invention relates to a stretchable composite yarn having a novel structure made by using a warp knitting machine, and having the novel structure, which has remarkable features which cannot be obtained by a conventional composite yarn such as a covering yarn. .

[0002]

2. Description of the Related Art A thread in which a stretchable thread such as a spandex thread is used as a core thread, and a spun thread or a textured thread is wound around the core thread in a single or double spiral manner is widely known as a so-called covering thread. It is useful as a yarn that can be dyed in a desired color and has a good feel and elasticity in various fields of knitted fabrics. However, the above-mentioned stretchable covering thread cannot fully utilize the stretchability of the stretchable thread used as the core thread because of its unique thread structure, and must use a slightly stretchable thread as the sheath thread. There is a problem in that a good quality covering thread cannot be produced and the friction durability is generally low.

First, a covering yarn having a highly stretchable yarn such as a spandex yarn as a core yarn can be freely stretched within the range of the elongation characteristics of the spandex yarn when it is stretched by an external force, and there is no particular problem. However, there is a problem that when the external force is released after it has been stretched to a very large extent and the sheath yarn shrinks, the spiral uniform arrangement of the sheath yarns collapses and the original wound state cannot be restored. As a result, the covering yarn cannot fully utilize the characteristics of highly stretchable yarn such as spandex yarn used as the core yarn, and only obtains stretchability within a narrow range limited by the winding conditions of the sheath yarn. I can't.

[0004] Next, the covering thread is weak in retaining the sheath thread with respect to the core thread due to its structure. As a result, in the elastic covering ring, the covering thread must be used unless a sheath thread having high retainability is used for the core thread. When the yarn shrinks, the wound sheath yarn sticks to the core yarn. As a result, the product made from the knitted fabric using the covering yarn has a problem that it is not practical due to the occurrence of fluffing during its use. Therefore, conventional stretchable covering yarns use textured yarns or spun yarns as sheath yarns, and do not use multifilaments, which have poor retainability for core yarns. It becomes a tone. On the other hand, there is a strong demand for a yarn having elasticity and gloss, but the current covering yarn does not meet the demand.

Further, as described above, in the covering yarn, since the sheath yarn is spirally wound on the outside of the core yarn, the holding property of the sheath yarn with respect to the core yarn is generally weak, and therefore the cover is particularly stretchable. The ring thread has low friction durability. Therefore, there is a problem that it is not suitable for application fields under severe usage conditions.

[0006]

DISCLOSURE OF THE INVENTION The present invention solves the problems of hitherto known stretchable covering yarns, and provides sufficient properties of stretchable yarns used as yarns that play a role equivalent to core yarns. An object of the present invention is to provide a composite yarn that can be utilized, can retain gloss as needed, and has excellent physical properties such as friction durability.

[0007]

The object of the present invention is to provide a wedge knitting yarn knitted with at least one non-stretchable yarn, and to insert the yarn into the wedge knitting yarn along its longitudinal direction as an insertion yarn. This is achieved by a stretchable composite yarn having a warp knit structure consisting of at least one stretchable yarn.

The non-stretchable yarn may be a long fiber yarn, that is, a multifilament, a multifilament textured yarn or a spun yarn. As the multifilament, viscose rayon yarn, cupolammonium rayon yarn, acetate rayon yarn or various synthetic fiber multifilament yarn can be used. By knitting a wedge knitting yarn using multifilaments, it is possible to impart gloss to the obtained composite yarn. It is more preferable to use the modified cross-section yarn in order to further exhibit the luster. Spandex yarn is generally used as the elastic yarn. However, depending on the use of the composite yarn, a strong twisted yarn or a textured yarn prepared so as to have higher elasticity than the corresponding wedge knitting yarn can be used.

The non-stretchable yarn constituting the wedge knitting yarn and the stretchable yarn constituting the inserted yarn are not limited to one, respectively,
Two or more non-stretchable yarns of the same or different type may be combined, that is, aligned or twisted and used for knitting a wedge knitting yarn, or several stretchable yarns of the same or different type. May be combined and used as an insertion thread.

Further, a stretchable yarn and a non-stretchable yarn may be combined and used as the insertion yarn. However, in this case, it is necessary to use, as the non-stretchable yarn, a yarn that can be dissolved by a solvent containing water or decomposed by heat during the treatment step after the production of the composite yarn. In the composite yarn produced in this manner, the tension applied to the composite yarn during the knitting process can be borne by the non-stretchable yarn in the inserted yarn, and as a result, the stretchable yarn in the inserted yarn is not stretched. Can be placed in a knitted fabric.
If the non-stretchable yarn in the inserted yarn of the obtained knitted fabric is removed in the subsequent scouring and dyeing step, the knitted fabric capable of sufficiently exhibiting the stretchability of the stretchable yarn in the inserted yarn of the composite yarn, that is, stretchable A knitted fabric having excellent properties can be obtained. The non-stretchable yarn used in the insertion yarn includes water such as water-soluble vinylon (registered trademark) that can be easily dissolved in warm water, that is, water-soluble polyvinyl alcohol yarn, acetone-dissolvable diacetate yarn, and the like. Any thread that can be dissolved in a solvent, and that can be decomposed by heat and, in some cases, light, as long as it has the strength to withstand the tension during processing such as knitting and weaving. However, it can be used.

The warp knitting structure of the stretchable composite yarn having the warp knitting structure in the present invention means a knitting structure knitted by a warp knitting machine, specifically, a knitting structure of a wedge knitting yarn. Although the wedge knitting yarn can be made by hand knitting using a hook needle, since it is knitted by utilizing the knitting mechanism of the warp knitting machine in industrial production, the wedge knitting yarn and the knitting yarn are inserted by the warp knitting structure of the present invention. In the present invention, a composite yarn in which the yarns are entangled with each other is specified as a composite yarn having a warp knit structure.

The present invention will be described in detail below with reference to the accompanying drawings showing an example of the composite yarn of the present invention. The composite yarn 1 of the present invention illustrated in FIG. 1 comprises an open loop wedge yarn 3 and an insert yarn 2 inserted in the wedge yarn 3 along the longitudinal direction of the wedge yarn 3. The knitting yarn 3 is a composite yarn 1
3a along the axial direction of the thread and the thread 3 crossing the axis
b and. The hook knitting yarn 3 also has a portion 3c that entangles itself in a U shape and a thread portion 3d that passes through. Therefore, the composite yarn 1 having the wedge knitted portion 3 as the sheath portion reflects light by the yarn portion 3a which is substantially parallel to the axial direction,
As a result, the yarn of the sheath portion has a gloss superior to that of the covering yarn wound in a spiral shape. Further, since the insertion yarn 2 is constrained by the yarn portion 3b that crosses the axis, it is possible to prevent the insertion yarn 2 from slipping with respect to the wedge knitting yarn 3 when the composite yarn is used in a product such as a knitted fabric. Since each part of the wedge-knitting yarn 3 is also entangled with each other by the yarn portion 3c and the yarn portion 3d, the composite yarn of the present invention has less fluffing than the covering yarn and has a high friction durability. Become.

The structure of the wedge yarn of the composite yarn illustrated in FIG. 1 is standard, and the wedge yarns of the structures shown in FIGS. 2 and 3 may be used. The composite yarn 4 of the present invention shown in FIG. 2 comprises a closed loop wedge yarn 6 and an insert yarn 5 inserted in the wedge yarn 6 along the longitudinal direction of the wedge yarn 6. In this composite yarn 4 as well, the wedge knitting yarn 6 has a portion along the axial direction, the insert yarn 5 is restrained by the wedge knitting yarn 6, and the respective parts themselves constituting the wedge knitting yarn 6 are restrained to each other. ing. The wedge knitting yarn of the composite yarn shown in FIG. 1 and FIG. 2 is obtained by knitting one yarn with one knitting needle. However, the wedge knitting yarn used in the composite yarn of the present invention can be formed by knitting one yarn using a plurality of knitting needles. For example, as shown in FIG. 3, a composite yarn formed by inserting an insertion yarn (not shown) into the open loop wedge knitting yarn 7 which is advanced by four courses in the same direction and knitted by five knitting needles Good. The morphology of the obtained composite yarn is the same as the morphology of the composite yarn of FIG. 1, but since the productivity at the time of knitting the knitting yarn is inferior by this method, as shown in FIG. It is virtually unthinkable to do.

Next, an example of a preferable method for producing the composite yarn of the present invention will be described. That is, a warp knitting machine having one needle bar in which a plurality of knitting needles are arranged in a straight line and at least two guide bars are provided with a plurality of knitting stations along the needle bar, and each knitting station is knitted. A bag that feeds at least one non-stretchable yarn to the front guide bar that moves in the knitting mode at the station and knits the knitting yarn with one knitting needle, and at the same time moves in the insert yarn forming mode. The stretchable yarn is supplied to at least one guide bar on the side and at least one stretchable yarn is inserted into the wedge knitting yarn made of non-stretchable yarn to knit a composite yarn, and the knitting station The composite yarn of the present invention can be manufactured by winding the composite yarn into a yarn package by a winding mechanism provided on the downstream side of the. The winding of the composite yarn may be performed by providing an individual winding mechanism for each knitting station and winding the yarn into an individual yarn package using a parallel bobbin or a bobbin with a flange, or a partial diameter adjusting beam. A plurality of composite yarns may be wound and then used in the knitting machine in the next step, or the plurality of composite yarns on the partial diameter adjusting beam may be separately sorted into individual yarn packages.

The composite yarn of the present invention thus obtained has the following characteristics as compared with the conventionally known covering yarn and the like. As described above, in the case of a covering yarn using a stretchable yarn as the core yarn, when the sheath yarn is stretched beyond the allowable range under the winding conditions and then the external force is released and the sheath yarn shrinks, the sheath yarn has a uniform spiral shape. However, there is a problem in that the original winding state cannot be restored due to the lack of proper arrangement, and as a result, the characteristics of highly stretchable yarn such as spandex yarn used as the core yarn cannot be fully utilized. On the other hand, in the case of the composite yarn of the present invention, since the wedge knitting yarn is formed in a loop structure, it can be stretched in a considerably wide range when an external force is applied, and when the external force is removed, the shape of the loop is formed. It can return to its original shape without disturbing. That is, the stretchable yarn used as the insert yarn can be inserted into the wedge knitting yarn in a wide range from the fully stretched state to the completely relaxed state, and as a result, the characteristics of the stretchable yarn can be effectively applied over the entire range. Can be used.

Further, in the composite yarn of the present invention, since the non-stretchable yarn constitutes the wedge knitting yarn with its own structure, various yarns can be used regardless of the kind of the stretchable yarn constituting the insertion yarn. The knitting yarn can be knitted. Therefore, as described above, the multifilament yarn, which has been difficult to use as the sheath yarn in the case of the elastic covering ring, can be made into the wedge knitting yarn. In addition, since the wedge knitting yarn has a portion parallel to the yarn axis direction, it has a good reflection on light, and this structure and the use of the multifilament form a composite yarn having excellent gloss and elasticity. Can be provided. Furthermore, the composite yarn of the present invention has a structure for tightening the inserted yarn by the horizontal portion of the wedge knitting yarn, and the wedge knitting yarn itself is constrained to each other. As a result, it can be used as a yarn with less fluffing and high friction durability.

[0017]

EXAMPLES The present invention will be described in detail below with reference to examples. Example 1 A nylon modified cross-section yarn 70d was supplied to the front side of a Russell warp knitting machine having two reeds to knit a wedge knitting yarn, and at the same time, a spandex yarn 210d was supplied to the back side as an insertion yarn to form a composite yarn. . The stitch size of the wedge knitting yarn was 50 per inch (2.54 cm). The obtained composite yarn was supplied to the front side and back side of the Russell warp knitting machine to knit a double-sided knitted fabric. The resulting knitted fabric had excellent gloss and stretchability in both the weft and weft directions.

EXAMPLE 2 A polyester textured yarn 75d is supplied to the front side of a Russell warp knitting machine having two reeds to knit a wedge knitting yarn, and at the same time, a water-soluble polyvinyl alcohol yarn 56d is drawn on a relaxed spandex 70d. They were aligned and fed to the back side of the Russell warp knitting machine as insertion yarns to form composite yarns. Using this composite yarn as a warp and polyester multifilament 75d / 2 as a weft, a plain woven fabric having a warp density of 24 yarns / cm and a weft yarn density of 35 yarns / cm was woven. The obtained woven fabric was scoured and then subjected to dark blue dyeing. The water-soluble polyvinyl alcohol yarn in the composite yarn was removed in the scouring and dyeing step, and as a result, a woven fabric having elasticity in the warp direction and useful for ladies' clothing was obtained.

[0019]

The composite yarn of the present invention has a novel structure in which an insert yarn made of a stretchable yarn is inserted into a wedge knitting yarn made of a non-stretchable yarn, which is a novel structure not found in conventional composite yarns. It is possible to obtain a composite yarn that can fully utilize the properties of the stretchable yarn that is used, can impart excellent gloss as required, and has excellent physical properties such as friction durability.

[Brief description of drawings]

FIG. 1 is a yarn structure diagram showing an example of a composite yarn of the present invention.

FIG. 2 is a yarn structure diagram showing another example of the composite yarn of the present invention.

FIG. 3 is a knitting structure diagram of a wedge knitting yarn used in still another composite yarn of the present invention.

[Explanation of symbols]

1,4 ... Composite yarn 2,5 ... Insert thread 3, 6, 7 ... Wedge yarn

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Claims (3)

(57) [Claims] 1. From a wedge knitting yarn knitted with at least one non-stretchable yarn, and at least one stretchable yarn inserted into the wedge knitting yarn as an insertion yarn along the longitudinal direction thereof. Stretchable composite yarn having a warp knitting structure. 2. The stretchable composite yarn having a warp knitting structure according to claim 1, wherein the non-stretchable yarn constituting the wedge knitting yarn is a long fiber yarn. 3. A stretchable yarn and a non-stretchable yarn are combined and used as the insert yarn, and the non-stretchable yarn in the insert yarn can be dissolved by a solvent containing water during a treatment step after the production of the composite yarn, or The stretchable composite yarn having a warp knitting structure according to claim 1, which is a yarn that can be decomposed by heat.