JP6286209B2 - Elastic warp knitted fabric - Google Patents

Description

  The present invention relates to a stretch warp knitted fabric having high stretchability in the weft direction.

  In elastic fabrics knitted by knitting non-elastic yarns and elastic yarns, elastic fabrics that obtain elasticity by looping tissue are elastic in the weft direction compared to the warp direction due to the structure of the looping tissue. There is a tendency for elongation to be low, and in applications such as underwear, sufficiently satisfactory stretchability has not been obtained.

  FIG. 12 is a diagram for explaining the structure of a conventional stretch warp knitted fabric. FIG. 12 (1) is a diagram showing a structure of a looping structure of inelastic yarns and elastic yarns. 2) is a view showing a state of the elastic yarn in the knitted fabric. In a stretch warp knitted fabric, it is the needle loop 1 that runs in the warp direction that is mainly responsible for the stretch in the warp direction, and the number of elastic yarns is 2 when viewed in the range of 1 gauge 1 course. Also, it is the sinker loop 2 that runs in the latitude direction that is mainly responsible for the elasticity in the latitude direction. Looking at the range of one gauge and one course, the number of elastic yarns crossing between the wells is one, so the number of elastic yarns supporting the warp direction and the weft direction is fundamentally different, and the warp direction and the weft direction are equal. Unable to ask for good stretch or elongation.

  In the conventional fabric described in Patent Document 1, for example, an elastic yarn is constituted by an inserted tissue, and there are a plurality of different types such as an elastic yarn for adjusting warp direction elongation and an elastic yarn for adjusting weft direction elongation. The elastic insertion thread that moves is often used for underwear as an excellent stretch fabric, but even in such conventional technology, the stretch power and elongation in the weft direction are lower than the warp direction due to the structure of the tissue. Have the problem of becoming.

  FIG. 13 is a diagram showing an organization of the prior art of Patent Document 1. Stretchability in the warp direction is achieved by inserting an elastic yarn in the warp direction as indicated by reference numeral 3 in FIG. Further, as shown by reference numeral 4 in FIG. 13B, the weft direction stretchability has a structure in which the course advances three courses in the warp direction and crosses one course in the weft direction. In this way, warp knitting is organized while all yarns advance in the warp direction. This warp knitting has a fundamental structure, so it is very good at controlling warp and stretchability in warp knitted fabrics. In this way, the yarn is not arranged only in the weft direction, but in the knitting structure, particularly in the warp knitting, the yarn for which the elasticity in the weft direction is required crosses the weft direction while moving in the warp direction. Therefore, there is a large proportion of elastic yarns that support the warp direction, and this conventional technique also has a problem that, as described above, it is not possible to obtain uniform stretch strength and elongation in the warp direction and the weft direction.

  FIG. 14 is a diagram showing a structure of a stretchable warp knitted fabric of still another conventional technique. Still another prior art of the stretch warp knitted fabric is described in Patent Document 2, for example. Even in warp knitted fabrics that seek to obtain stretchability through the combination of looping structure and insertion elastic yarn, including multi-needle overlap (double stitch) elastic yarn, double stitching stops unraveling the fabric and Although it is preferable as a method for increasing the expansion / contraction power, if a uniform stretchability or elongation is required in the warp direction and the weft direction, the double stitch structure becomes a negative factor, and the stretch balance between the warp direction and the weft direction becomes worse. There is a problem of end.

  Fig. 14 (1) is a diagram showing a two-dimensional knitting structure, and Fig. 14 (2) shows a two-dimensional knitting structure as a fabric, and the elastic yarn 5 is inserted into the ground structure. Double stitching is an organization that simultaneously creates two loops in one course, and the entire surface is formed as a double loop fabric. The insertion thread 6 is mainly responsible for the warp direction stretchability, and the two-knitted textured sinker loops 7 and 8 give the fabric an extension in the weft direction. In FIG. Looking at the course range, there will be two elastic threads. When the double loop portion is viewed in the range of one gauge and one course, four elastic yarns are added in the warp direction. Therefore, there is a problem that uniform stretchability or elongation cannot be obtained in the warp direction and the weft direction.

Japanese Patent No. 2718441 Japanese Patent No. 4102829

  An object of the present invention is to provide a stretch warp knitted fabric that can obtain high stretchability in the weft direction.

The present invention is a stretch warp knitted fabric knitted by knitting inelastic yarn and elastic yarn,
The inelastic yarn constitutes a looping ground structure,
The elastic yarn is
A first elastic yarn that is held by the inelastic yarn and forms a tissue on the back side of the looping ground tissue;
The first elastic yarn is made of an elastic yarn having higher elastic force than the first elastic yarn, is entangled with the first elastic yarn while being held by the inelastic yarn, and forms a tissue on the back side of the looping ground tissue. 2 and the elastic yarn, only including,
The first elastic yarn is an elastic warp knitted fabric entangled with the second elastic yarn so as to reciprocate once per course .

  According to the present invention, the thickness of the first elastic yarn is 20 denier or more and 140 denier or less, and the thickness of the second elastic yarn is 70 denier or more and 630 denier or less.

  Further, the present invention is characterized in that a handle structure knitted by the inelastic yarn is incorporated in the looping ground structure.

  Further, the invention is characterized in that a structure constituted by the first and second elastic yarns is composed of a plurality of regions having different powers.

According to the present invention, the first elastic yarn having a low elastic force and the second elastic yarn having a high elastic force are held by the inelastic yarn, and the second elastic yarn is reciprocated once per course. Since the configuration is entangled, the first elastic yarn having a low elastic force is pulled out by the restoring force of the second elastic yarn forming the insertion structure having a high elastic force to be in a linear state, and is highly stable in the weft direction of the fabric. A stretchable warp knitted fabric having stretchability can be realized.

It is a figure which shows the structure | tissue structure of the elastic warp knitted fabric which shows one Embodiment of this invention. It is a figure showing the structure | tissue of an elastic fabric. It is a figure showing the structure | tissue of the kind of elastic fabric from which a property differs from FIG. It is a figure which shows the state which knitted the elastic yarns 10 and 11 to the ground organization. FIG. 3 is a view showing a state in which an elastic yarn 10 is pulled out by an elastic yarn 11. It is a figure which shows the state which knitted the elastic yarns 10 and 11 to the ground organization. FIG. 3 is a view showing a state in which an elastic yarn 10 is pulled out by an elastic yarn 11. It is an enlarged view of the part A of FIG. It is an enlarged view of the part B of FIG. It is an enlarged view of the part C of FIG. It is an enlarged view of the part D of FIG. It is a figure which shows the structure | tissue structure of the elastic warp knitted fabric of a prior art. It is a figure which shows the structure | tissue structure of the elastic warp knitted fabric of another prior art. It is a figure which shows the structure | tissue structure of the elastic warp knitted fabric of another prior art.

  FIG. 1 is a view showing the structure of a stretch warp knitted fabric showing an embodiment of the present invention. As shown in FIG. 1 (1), the elastic yarn 10 constituting the looping structure located on the front side and the elastic yarn 11 constituting the insertion structure located on the back side have high stretchability in the weft direction. A stretch warp knitted fabric can be realized. An elastic yarn with relatively weak power is used for the looping tissue, and an elastic yarn with relatively strong power is used for the elastic yarn of the insertion tissue. When knitting with a knitting machine, these two elastic yarns 10 and 11 are supported by the non-elastic yarn applied to the needle and knitted as shown in FIG.

  When the knitting progresses and the loop is detached from the needle and becomes a fabric, the sinker loop of the weak elastic elastic yarn 10 is pulled out by the tension of the strong elastic elastic yarn 11 as shown in FIG. When this is seen within the range of 1 gauge per course, a state where the four elastic yarns 11 cross between the wells can be created. Since the knitting structure in which the elastic yarn 10 having a weak looping structure and the elastic yarn 11 having a high tension as an insertion yarn are entangled, the tension in the weft direction can be effectively adjusted. A well-balanced stretchability can be realized, and when the fabric is stretched, power can be smoothly transmitted from the weak tension elastic yarn 10 to the strong tension elastic yarn 11, and a comfortable stretch performance can be exhibited when worn. Can be made.

  In this embodiment, as a method for improving the stretchability in two directions, a non-elastic yarn is used for the ground texture, and the first elastic yarn and the second elastic yarn are entangled with the non-elastic yarn and knitted. The elastic yarn 10 which is the first elastic yarn is held by the inelastic yarn and constitutes a looping structure on the back side of the looping ground structure constituted by the inelastic yarn. The elastic yarn 11 as the second elastic yarn is made of an elastic yarn having a higher tension than that of the elastic yarn 10 and is entangled with the elastic yarn 10 while being held by the non-elastic yarn, and on the back side of the looping ground structure. Configure insert tissue.

  By being configured in this way, the elastic thread 11 as the insertion thread efficiently pulls out the sinker loop of the elastic thread 10 constituting the looping structure and ensures the entanglement with the elastic thread 10, so that at least the same needle The looping structure is formed such that the loops are continuous for two or more courses, and the sinker loop is formed on the needle loop so that the upright portion is formed like a knitted line.

  The elastic warp knitted fabric 1 is composed of a ground structure and an insertion yarn. The insertion yarns are inserted along the warp direction into the warp-knitted ground structure in a state where the insert yarns are arranged at intervals of 1 well in the warp direction. Each of the insertion yarns 10 has a transition portion that extends in a direction that intersects the warp direction as a whole, and a portion that connects to a transition portion that extends in both directions in the warp direction.

  2 and 3 are diagrams showing the structures of two types of stretchable fabrics having different properties. The same yarn is used for both tissues. In the figure, reference symbols JB1, GB2, and GB5 are inelastic yarns, and GB3 is an elastic yarn that has a high tension, that is, an elastic yarn 11. , GB4 is also an elastic yarn having a low tension, that is, an elastic yarn 10.

  As for the two types of knitted fabrics, the fabric having the structure shown in FIG. 2 exhibits a stronger tension in the weft direction (well direction) than in FIG. On the other hand, the fabric having the structure shown in FIG. 3 is soft and well stretched in the weft direction. This is due to the difference in the structure of the elastic yarn GB3, more precisely due to the difference in the entanglement between the elastic yarn GB3 and the elastic yarn GB4, that is, the elastic yarns 10 and 11.

  4 and 6 are diagrams showing a knitted structure of the elastic yarns 10 and 11. 5 and 7 show a state in which the tension of one elastic thread 10 is changed so as to be weaker than the tension of the other elastic thread 11, and the elastic thread 10 is pulled out to the other elastic thread 11. Indicates. The elastic yarn 10 is structured so as to press the elastic yarn 11 of the insertion tissue, but the structure meandering to the left and right changes linearly due to the high tension of the elastic yarn 11. At this time, the elastic yarn 10 is pulled in by the strong tension of the elastic yarn 11, and the state shown in FIG.

  8 is an enlarged view of part A in FIG. 4, FIG. 9 is an enlarged view of part B in FIG. 5, FIG. 10 is an enlarged view of part C in FIG. 6, and FIG. It is an enlarged view of D. Reference symbol a indicates a portion with high tension, and reference symbols b and c indicate portions with low tension. 9 and 11 show a state in which the knitted fabric is relaxed, and part a shows a state of part a1, part b shows part b1, and part c shows a state where the entanglement of the yarn changes part c1. 4 to 7, 8, 9, 10, and 11, for ease of illustration, the needle loop is omitted and only the sinker loop is shown. The elastic yarn 11 is knitted in a state where tension is applied on the knitting machine.

  When the fabric is relaxed after knitting, the elastic yarn 11 having a high tension guided in the state of the reference symbol a tries to return to the original state by its strong restoring force and changes to the state of the linear portion a1. . Between the 2nd course and the 3rd course of FIG. 8, the underlap motion of the reverse direction which the part a and the part b oppose is performed. Here, the part a performs a two-needle underlap movement from right to left, and the part b forms a tissue by a combination of the left and right, one needle underlap movement.

  At this time, the part b is attracted by the restoring force to return the part a to the linear state, and as shown in FIG. 9, the part b1 is bent into a key shape. The lower part of the bowl-shaped part b spans between two elastic yarns 11 of the adjacent part a1, and the upper part spans between three of the elastic yarns 11. The fabric is entangled in one and a half rounds per course, so the fabric at this time is highly stretchable in the weft direction.

Between the 1st course and the 2nd course in FIG. 8, the part a performs a two-needle underlap movement from the left to the right, and the part c is composed of a combed knitted structure that rises vertically without underlap, The portion c is attracted by the restoring force that attempts to be in the straight state of the portion a, and becomes a portion c1 that is bent into a bowl shape in FIG. It is entangled in a form of reciprocating once per course across two elastic yarns 11 of the adjacent part a1 which becomes the lower part or upper part of the bowl shape, and the stretchable part is the entangled part of FIG. Although the elastic force is slightly lower than that of b1, the upper and lower stages are entangled between the same elastic yarns 11 , so that the elastic force is stable and exhibits a good elongation property.

  FIG. 10 shows that the elastic yarn 10 is knitted in a state where tension is applied on the knitting machine, as described above. When it relaxes, it tries to return to its original state by its own elastic recovery force, and becomes a straight portion a1.

Between the 2nd course and the 3rd course in FIG. 10, the portion a constitutes a combined structure of two needles underlap movement from right to left, and the portion b does not underlap and rises vertically. The part b is attracted by the restoring force to return to the linear state of the part a, and changes to a part b1 bent into a bowl shape in FIG. Both the lower and upper portions of the hook shape cross between two elastic yarns 11 of the adjacent portion a1. The entanglement is performed in one reciprocation per course, and its elasticity is slightly lower than that of the portion b1 in FIG. 8 described above. However, the upper and lower stages are entangled between the same elastic yarns 11 and are stable. And exhibits good properties.

  Between the 1st course and the 2nd course in FIG. 10, the part a and the part c perform the underlap motion in the same direction. Part a constitutes a combined structure of yarns that perform two-needle underlap movement from left to right, and part c constitutes one needle underlap movement from left to right. Thus, the portion c is drawn while being wound, and as shown in FIG. 11, the portion c1 is wound around the portion a1 of the strong elastic yarn 11, and the portion a1 is supported by the portion a1. As stretchability, it is soft and well stretched.

The entanglement of the elastic yarn 10 that appears under the influence of the strong elastic force of the elastic yarn 11 is that the four patterns of the parts b1 and c1 in FIG. 9 and the parts b1 and c1 in FIG. give it serves, if you look at their shape, between which is supported by the elastic yarn 11 having a strong resilient force, the elongation of the lower elastic yarn 10 elastic force increases. If you arrange such stretch force in order of strength,
Part b1 in FIG. 9> part c1 in FIG. 9 and part b1 in FIG. 11> part c1 in FIG.
And can be divided into these three patterns.

  Such a difference in the elastic force is that the direction of the underlap motion is opposite in the structure constituted by the elastic thread 10 having a low elastic force that is an overlapping structure and the elastic thread 11 having a high elastic force that is an inserted tissue. It can also be realized by combining the same direction and the large and small number of jumps exceeding the distance between the needles. In this method, since the stretchability in the weft direction can be effectively obtained, it is easy to adjust the warp direction stretch, and it is possible to improve the inherent defects of the warp knitted fabric which is difficult to adjust in the weft direction stretchability. it can. In addition, by interlacing the two types of elastic yarns 10 and 11, smooth transmission from weak elastic force to strong elastic force can be achieved, so to speak, a wide range of expansion and contraction performance from soft power to hard power can be realized. A well-stretched fabric having a balance of stretchability in the weft and oblique directions can be realized.

  As another embodiment of the present invention, a stretch warp knitted fabric rich in stretch in the weft direction is configured by incorporating a handle structure knitted by a jacquard ridge threaded with an inelastic thread into the looping fabric structure. May be.

  As still another embodiment of the present invention, in the structure constituted by the first and second elastic yarns 10 and 11, the first elastic yarn 10 on the side having a low elastic force is partially separated by a plurality of wrinkles. By changing the structure, an elastic warp knitted fabric composed of a plurality of regions having different powers may be realized.

10,11 Elastic thread a, b, c; a1, b1, c1 part

Claims (4)

An elastic warp knitted fabric knitted by knitting inelastic yarns and elastic yarns,
The inelastic yarn constitutes a looping ground structure,
The elastic yarn is
A first elastic yarn that is held by the inelastic yarn and forms a tissue on the back side of the looping ground tissue;
The first elastic yarn is made of an elastic yarn having higher elastic force than the first elastic yarn, is entangled with the first elastic yarn while being held by the inelastic yarn, and forms a tissue on the back side of the looping ground tissue. 2 and the elastic yarn, only including,
The elastic warp knitted fabric, wherein the first elastic yarn is entangled with the second elastic yarn so as to reciprocate once per course .   2. The stretchability according to claim 1, wherein a thickness of the first elastic yarn is 20 denier or more and 140 denier or less, and a thickness of the second elastic yarn is 70 denier or more and 630 denier or less. Warp knitted fabric.   The stretch warp knitted fabric according to claim 1 or 2, wherein a pattern texture knitted by the inelastic yarn is incorporated in the looping texture.   The stretch warp knitted fabric according to any one of claims 1 to 3, wherein the structure constituted by the first and second elastic yarns comprises a plurality of regions having different powers.

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