Stretch knitted fabric

Abstract

To provide a stretchable warp knitted fabric which has excellent stretchability in the vertical, horizontal and diagonal directions and exhibits uniform free-cut function at any cut edge. [Solution] In an elastic warp knitted fabric knitted by combining a support structure 10 knitted with a non-elastic yarn 1 and first to third insertion structures 20-40 formed by inserting first to third elastic yarns 2-4, respectively, the support structure 10 has a reciprocating course in which the non-elastic yarn 1 moves back and forth between wales, the first elastic yarn 2 is inserted together with the non-elastic yarn 1, the second elastic yarn 3 is inserted on the same wale between the reciprocating course and the next course, and is inserted together with the non-elastic yarn 1 between the reciprocating course and the previous course, and the third elastic yarn 4 is inserted together with the non-elastic yarn 1 between the reciprocating course and the next course, and is inserted on the same wale between the reciprocating course and the previous course.

Description

[Technical Field]

[0001] The present invention relates to a stretchable warp knitted fabric, more particularly to a warp knitted fabric having excellent stretchability for use in foundations, sportswear, etc. [Background technology]

[0002] As is well known, in the case of women's underwear such as shorts, girdles, and brassieres, as well as sportswear such as leotards and swimwear, it is important that they are comfortable to wear, in addition to having a good design and texture. Therefore, the stretchable warp knitted fabrics used for these foundations and other items are required to have good stretchability in both the warp and weft directions.

[0003] Furthermore, stretchable warp knitted fabrics used for foundations and the like are required to have a free-cut function that eliminates the need for edge finishing. With ordinary warp knitted fabrics, the raw edges tend to unravel when cut, so conventionally, it has been necessary to finish the edges by folding them back and sewing them or by attaching other fabrics to them. However, finishing the edges in this way increases the thickness of the edges, which impairs the wearability and design of foundations and the like.

[0004] Therefore, up to now, a stretchable warp knitted fabric that has excellent stretchability in the warp, weft and diagonal directions and also has a free-cut function has been proposed, for example, as described in Patent Document 1. This warp knitted fabric is knitted by inserting at least two types of elastic yarn into a support structure made of inelastic yarn, and line contact areas where these at least two types of elastic yarn run together are formed between all courses, and these line contact areas are heat-fused.

[0005] However, since this warp knitted fabric had two types of elastic yarns inserted in a mesh pattern, these two types of elastic yarns were not present in the holes of the mesh structure, and depending on the cutting position of the warp knitted fabric, there was a drawback in that the cut edges would partially unravel. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 6757951 Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention was made in consideration of the above-mentioned drawbacks of conventional stretchable warp knitted fabrics, and aims to provide a stretchable warp knitted fabric that has excellent stretchability in the vertical, horizontal and diagonal directions, and that exhibits uniform free-cut functionality at all cut edges, regardless of the cutting position. [Means for solving the problem]

[0008] The present invention provides a stretchable warp knitted fabric knitted in combination with a support structure in which a non-elastic yarn is knitted by swinging it to other wales in predetermined courses and needle loops are formed in all courses, a first insertion structure in which a first elastic yarn is inserted by swinging it in a zigzag pattern in every course, a second insertion structure in which a second elastic yarn is inserted by swinging it in a zigzag pattern in every course, and a third insertion structure in which a third elastic yarn is inserted by swinging it in a zigzag pattern in every course, The support structure has a round-trip course in which the inelastic yarn is swung to the maximum in another wale, and in the next course the inelastic yarn is swung in the opposite direction and returns to the original wale, the first elastic yarn of the first insertion structure is inserted together with the inelastic yarn between all courses, the second elastic yarn of the second insertion structure is inserted on the same wale between the reciprocating course and the course next to the reciprocating course, and is inserted together with the inelastic yarn between the reciprocating course and the course immediately preceding the reciprocating course, The third elastic yarn of the third insertion structure is inserted together with the inelastic yarn between the reciprocating course and the course next to the reciprocating course, and is inserted on the same wale between the reciprocating course and the course immediately preceding the reciprocating course.

[0009] The present invention is also characterized in that the second elastic yarn and / or the third elastic yarn is swung to other wales between courses other than between the round trip course and the next course and between the round trip course and the previous course.

[0010] The present invention is also characterized in that the elastic force of the second elastic yarn and the third elastic yarn is smaller than the elastic force of the first elastic yarn.

[0011] The present invention is also characterized in that the support structure includes a modified structure produced by a jacquard knitting machine. [Effects of the Invention]

[0012] According to the stretchable warp knitted fabric of the present invention, a support structure having a reciprocating course in which a non-elastic yarn moves back and forth between wales is knitted in combination with a first insertion structure, a second insertion structure and a third insertion structure in which a first elastic yarn, a second elastic yarn and a third elastic yarn are inserted in a specific structure, respectively.Therefore, after knitting, within a virtual basic lattice consisting of the range of one wale between adjacent wales x half the course of one repeating unit of each knitted structure, at least a diagonal portion made of the second elastic yarn and a diagonal portion made of the third elastic yarn that intersects with this diagonal portion of the second elastic yarn are formed, and the warp knitted fabric as a whole has excellent stretchability in four directions: warp, weft and diagonal, and exhibits almost isotropic stretchability.

[0013] Furthermore, in the stretchable warp knitted fabric according to the present invention, this virtual basic lattice is repeatedly developed throughout the entire warp knitted fabric, so that any cut edge exhibits a uniform free-cut function regardless of the cutting position or cutting direction. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 2 is an exploded view of the knitting structure of the inelastic yarn and each elastic yarn of the stretchable warp knitted fabric of the embodiment according to the present invention. [Figure 2] FIG. 2 is a diagram showing the knitting structure of the stretchable warp knitted fabric of the same embodiment. [Figure 3] FIG. 2 is a knitting structure diagram showing only a support structure and a first insertion structure in the stretchable warp knitted fabric of the same embodiment. [Figure 4] 10 is a diagram showing changes after knitting of a support tissue and a first insertion tissue in the stretchable warp knitted fabric of the same embodiment. FIG. [Figure 5] FIG. 2 is a knitting structure diagram showing only a support structure and a second insertion structure in the stretchable warp knitted fabric of the same embodiment. [Figure 6] 10 is a diagram showing changes after knitting of a support tissue and a second insertion tissue in the stretchable warp knitted fabric of the same embodiment. FIG. [Figure 7] FIG. 10 is a knitting structure diagram showing only a support structure and a third insertion structure in the stretchable warp knitted fabric of the same embodiment. [Figure 8] 10 is a diagram showing changes after knitting of a support tissue and a third insertion tissue in the stretchable warp knitted fabric of the same embodiment. FIG. [Figure 9] 10 is a schematic diagram showing the state in which each elastic yarn is overlapped after being changed after knitting the stretchable warp knitted fabric of the same embodiment. FIG. [Figure 10] 10 is a photograph, used as a substitute for a drawing, showing the stretchable warp knitted fabric of the embodiment in a stretched state. DETAILED DESCRIPTION OF THE INVENTION

[0015] As shown in Figures 1 and 2, the stretchable warp knitted fabric of this embodiment is knitted by combining a support structure 10 knitted with a non-elastic yarn 1, a first insertion structure 20 formed by inserting a first elastic yarn 2, a second insertion structure 30 formed by inserting a second elastic yarn 3, and a third insertion structure 40 formed by inserting a third elastic yarn 4.

[0016] The knitted structure of the support structure 10 in this embodiment has a repeat unit of six courses in total: 12 / 21 / 23 / 21 / 12 / 10 / / , and needle loops are formed in all courses by each non-elastic yarn 1 threaded in full set on the first reed GB1 of the warp knitting machine. As shown in Fig. 3, this support structure 10 has reciprocating courses CR in which each non-elastic yarn 1 is swung to the left and right to the maximum extent to other wales (third course C3, sixth course C6), and in the next courses (fourth course C4, first course C1), each non-elastic yarn 1 is swung in the opposite direction and returns to the original wale. That is, in this embodiment, the third course C3 and the sixth course C6 of the support structure 10 are each reciprocating courses CR in which each non-elastic yarn 1 moves back and forth between wales.

[0017] The non-elastic yarn 1 can basically be made of the same yarn material as that used for ordinary warp knitted fabrics. It is sufficient if the yarn has less stretch or elasticity than the elastic yarn. Specifically, synthetic fibers such as nylon and polyester, regenerated fibers such as rayon and acetate, and natural fibers such as cotton and silk can be selected appropriately depending on the application and desired performance of the warp knitted fabric. These fibers may be in any form, such as filament yarn, spun yarn, or twisted yarn.

[0018] The fineness of the non-elastic yarn 1 is preferably in the range of 15 to 170 T, more preferably in the range of 20 to 90 T. Various design changes are possible in consideration of the balance with the elastic force of each elastic yarn (2, 3, 4) described later.

[0019] Furthermore, each stitch of the support structure 10 may be an open stitch or a closed stitch, and can be selected appropriately depending on the use of the warp knitted fabric and the required performance.

[0020] 1 and 2, the knitted structure of the first insertion structure 20 of this embodiment has a repeat unit of six courses in total, 22 / 11 / 33 / 11 / 22 / 00 / / , and each first elastic yarn 2, which is threaded in a full set on the second reed GB2 behind the first reed GB1, is inserted in a zigzag pattern for each course. That is, during knitting, the first elastic yarn 2 is inserted from the left side of the knitting needle of each wale in one course to the right side of the knitting needle of the same wale or the knitting needle of the adjacent wale in the next course, and then further to the left side of the knitting needle of the same wale or the knitting needle of the adjacent wale in the next course, and this is repeated, so that the first elastic yarn 2 is inserted alternately left and right for each course.

[0021] 3, the first elastic yarn 2 is inserted along with the inelastic yarn 1 in all courses. Therefore, the first elastic yarn 2 crosses the sinker loops of the inelastic yarn 1 in all courses.

[0022] As a result, after knitting the stretchable warp knitted fabric of this embodiment, as shown in Fig. 4, the first elastic yarn 2, which attempts to return to a substantially straight shape due to its elastic recovery force, crosses the stitches of the support structure 10 in the reciprocating course CR, causing an evasion wrap phenomenon E2 in which the vertical positional relationship between the first elastic yarn 2 and the inelastic yarn 1 is reversed. This evasion wrap phenomenon E2 causes the first elastic yarn 2, which is inserted in a zigzag pattern, to form warp portions 2a along the course direction X (knitting direction), which contributes to improving the stretchability of the stretchable warp knitted fabric mainly in the warp direction.

[0023] In Fig. 4, to avoid cluttering the drawing, the evasion wrap phenomenon caused by the first elastic yarn 2 is shown only in the round-trip course CR (third course C3 and sixth course C6), but this evasion wrap phenomenon caused by the first elastic yarn 2 also occurs in the courses following the round-trip course CR (fourth course C4, first course C1) and in the courses preceding the round-trip course CR (second course C2, fifth course C5) (see the schematic diagram in Fig. 9). Furthermore, the evasion wrap phenomenon caused by the first elastic yarn 2 causes the first elastic yarn 2 and the inelastic yarn 1 to wrap around each other (see Fig. 10), reliably preventing the inserted first elastic yarn 2 from slipping out.

[0024] A yarn material generally known as an elastic yarn can be used for the first elastic yarn 2. Specifically, for example, polyurethane elastic yarn, covering yarn with a polyurethane elastic yarn as a core material, polyetherester elastic yarn, etc. can be appropriately selected depending on the application of the warp knitted fabric and the required performance.

[0025] The fineness of the first elastic yarn 2 is preferably in the range of 30 to 1000 T, more preferably in the range of 40 to 500 T. Various design changes are possible taking into consideration the above-mentioned evasion wrap phenomenon with the non-elastic yarn 1 and the balance with the elastic force of the other elastic yarns (3, 4) described below.

[0026] As shown in Figures 1 and 2, the knitted structure of the second insertion structure 30 of this embodiment has a repeat unit of 22 / 00 / 22 / 11 / 33 / 11 / / , a total of six courses, and each second elastic yarn 3, which is threaded in a full set through the third reed GB3 behind the second reed GB2, is inserted in a zigzag pattern, alternating left and right, for each course, similar to the first elastic yarn 2.

[0027] 5, this second elastic yarn 3 is inserted on the same wale in the interval A between the reciprocating course CR and the next course (fourth course C4, first course C1), and is inserted together with the inelastic yarn 1 in the interval B between the reciprocating course CR and the previous course (second course C2, fifth course C5). Therefore, the second elastic yarn 3 does not intersect with the sinker loops of the inelastic yarn 1 in the interval A, but does intersect with the sinker loops of the inelastic yarn 1 in the interval B.

[0028] As a result, after knitting the stretchable warp knitted fabric of this embodiment, as shown in Fig. 6, the second elastic yarn 3, which attempts to return to a substantially straight shape due to its elastic recovery force, crosses the stitches of the support structure 10 in the reciprocating course CR, and an evasion wrap phenomenon E3 occurs obliquely due to the non-crossing portion between courses A. This evasion wrap phenomenon E3 causes a diagonal portion 3a inclined relative to the course direction X (knitting direction) to be formed in the second elastic yarn 3, which contributes to improving the stretchability of the stretchable warp knitted fabric, mainly in the diagonal direction.

[0029] In this embodiment, the diagonal portion 3a of the second elastic yarn 3 is formed with a left-shoulder-upward slope between the second course C2 and the fourth course C4, and a right-shoulder-upward slope between the fifth course C5 and the first course C1, thereby improving the elasticity in two diagonal directions (diagonal directions) within one repeating unit of the knitting structure of the elastic warp knitted fabric.

[0030] In this embodiment, as shown in Fig. 5, the second elastic yarn 3 is swung to other wales in another inter-course interval C other than the inter-course interval A and the inter-course interval B. As a result, after knitting the stretchable warp knitted fabric of this embodiment, as shown in Fig. 6, a weft portion 3b along the wale direction Y (knitting width direction) is formed in the second elastic yarn 3, which contributes to improving the stretchability of the stretchable warp knitted fabric mainly in the weft direction.

[0031] The second elastic yarn 3, like the first elastic yarn 2, can be made of a yarn material generally known as an elastic yarn, and can be selected appropriately depending on the use of the warp knitted fabric and the required performance, such as polyurethane elastic yarn, covering yarn with polyurethane elastic yarn as a core material, polyether ester elastic yarn, etc.

[0032] The fineness of the second elastic yarn 3 is preferably in the range of 20 to 160 T, and more preferably in the range of 30 to 100 T. From the viewpoint of more effectively forming the diagonal portion 3a of the second elastic yarn 3 after knitting the stretchable warp knitted fabric, it is preferable that the elastic force of the second elastic yarn 3 is smaller than the elastic force of the first elastic yarn 2. Various design changes are possible taking into consideration the evasion wrap phenomenon with the non-elastic yarn 1, the balance with the elastic forces of the other elastic yarns (2, 4), and the like.

[0033] As shown in Figures 1 and 2, the knitted structure of the third insertion structure 40 of this embodiment has a repeat unit of 22 / 11 / 22 / 00 / 11 / 00 / / , a total of six courses, and each third elastic yarn 4, which is threaded in a full set through the fourth reed GB4 behind the third reed GB3, is inserted in a zigzag pattern, alternating left and right, for each course, similar to the first elastic yarn 2.

[0034] 7, this third elastic yarn 4 is inserted together with the inelastic yarn 1 in the interval A between the reciprocating course CR and the next course (fourth course C4, first course C1), and is also inserted on the same wale in the interval B between the reciprocating course CR and the previous course (second course C2, fifth course C5). Therefore, the third elastic yarn 4 intersects with the sinker loops of the inelastic yarn 1 in the interval A, but does not intersect with the sinker loops of the inelastic yarn 1 in the interval B.

[0035] As a result, after knitting the stretchable warp knitted fabric of this embodiment, as shown in Fig. 8, the third elastic yarn 4, which attempts to return to a substantially straight shape due to its elastic recovery force, crosses the stitches of the support structure 10 in the reciprocating course CR, causing an evasion wrap phenomenon E4 at an angle due to the non-crossing portion between courses B. This evasion wrap phenomenon E4 causes a diagonal portion 4a inclined relative to the course direction X (knitting direction) to be formed in the third elastic yarn 4, which contributes to improving the stretchability of the stretchable warp knitted fabric, mainly in the diagonal direction.

[0036] In this embodiment, the diagonal portion 4a of the third elastic yarn 4 is formed with an upward slope to the right between the first course C1 and the fourth course C4, and with an upward slope to the left between the fourth course C4 and the first course C1, thereby improving the elasticity in two diagonal directions (diagonal directions) within one repeating unit of the knitting structure of the elastic warp knitted fabric.

[0037] In this embodiment, as shown in Figure 7, the third elastic yarn 4 is inserted on the same wale in a course interval C other than course interval A and course interval B, and is not swung to other wales. However, similar to the second elastic yarn 3 described above, or instead of the second elastic yarn 3, the third elastic yarn 4 may be swung to other wales in the course interval C.

[0038] As with the first elastic yarn 2, the third elastic yarn 4 can be made of a yarn material generally known as an elastic yarn, and can be selected appropriately depending on the use of the warp knitted fabric and the required performance, such as polyurethane elastic yarn, covering yarn with polyurethane elastic yarn as a core material, polyether ester elastic yarn, etc.

[0039] Similarly to the second elastic yarn 3, the fineness of the third elastic yarn 4 is preferably in the range of 20 to 160 T, more preferably in the range of 30 to 100 T. From the viewpoint of more effectively forming the diagonal portion 4a of the third elastic yarn 4 after knitting the stretchable warp knitted fabric, it is preferable that the elastic force of the third elastic yarn 4 is smaller than the elastic force of the first elastic yarn 2. Various design changes are possible taking into consideration the evasion wrap phenomenon with the non-elastic yarn 1, the balance with the elastic forces of the other elastic yarns (2, 3), and the like.

[0040] As explained above, the elastic warp knitted fabric of this embodiment is knitted by combining a support structure 10 having a reciprocating course CR knitted with a non-elastic yarn 1 with a first insertion structure 20, a second insertion structure 30 and a third insertion structure 40 in which the first elastic yarn 2, the second elastic yarn 3 and the third elastic yarn 4 are inserted in the specific structures described above, respectively.Therefore, according to the elastic warp knitted fabric of this embodiment, after knitting, as shown in Figure 9, within a virtual basic lattice L consisting of a range of 1 wale between adjacent wales x 3 courses, which is half the repeat unit of each knitted structure, there will be a warp portion 2a made of the first elastic yarn 2, a weft portion 3b and a diagonal portion 3a made of the second elastic yarn 3, and a diagonal portion 4a made of the third elastic yarn 4 that intersects with the diagonal portion 3a of the second elastic yarn 3.

[0041] Therefore, the stretchable warp knitted fabric of this embodiment has excellent stretchability in the four directions of warp, weft and diagonal, and the warp knitted fabric as a whole exhibits nearly isotropic stretchability.

[0042] Furthermore, since this virtual basic lattice L is repeatedly deployed throughout the entire warp knitted fabric, the stretchable warp knitted fabric of this embodiment exhibits uniform free cutting function at all cut edges, regardless of the cutting position or cutting direction.

[0043] Furthermore, in the elastic warp knitted fabric of this embodiment, a virtual basic lattice L containing the warp portion 2a of the first elastic yarn 2, the weft portion 3b and diagonal portion 3a of the second elastic yarn 3, and the diagonal portion 4a of the third elastic yarn 4 is repeatedly deployed throughout the warp knitted fabric, thereby providing excellent curl suppression effect on all cut edges. [Example]

[0044] The same knitting design (FIG. 1) as the stretchable warp knitted fabric of this embodiment was adopted, and the stretchable warp knitted fabrics of Examples 1 to 5 were knitted using the yarns shown in Table 1.

[0045] [Table 1]

[0046] The stretchable warp knitted fabrics of Examples 1 to 5 were subjected to a scouring and relaxation process using a spread-weave relaxer, a pre-setting process at approximately 190°C (18 m / min), a jet dyeing process at approximately 95°C, and a final setting process at approximately 160°C (18 m / min) using a silicone softener as a finishing agent. The resulting stretchable warp knitted fabrics of each Example were then cut into 20 cm lengthwise and 20 cm widthwise, and further cut diagonally to obtain samples of each Example. The curl and cut edge of the samples of Examples 1 to 5 were evaluated before and after washing.

[0047] [Table 2]

[0048] As a result, as shown in Table 2, no fraying was observed at the cut edges of any of the samples of Examples 1 to 5. Furthermore, no curling was observed at the cut edges of the samples of Examples 3 to 5 before or after washing.

[0049] Although the stretchable warp knitted fabric of this embodiment has been described above, the present invention can also be carried out in other embodiments.

[0050] For example, in the stretchable warp knitted fabric according to the present invention, the first elastic yarn 2, the second elastic yarn 3, and the third elastic yarn 4 may be thermally bonded at their contact points with each other, for example, by heat setting (approximately 190°C) before dyeing. This can further improve the free-cut function. Furthermore, if low-melting-point polyurethane elastic yarns are used as the first elastic yarn 2, the second elastic yarn 3, and the third elastic yarn 4, the contact points of the elastic yarns can be more stably bonded, further improving the free-cut function.

[0051] Furthermore, in the stretchable warp knitted fabric according to the present invention, the support structure 10 may partially include a modified structure created by a jacquard knitting machine. This allows for the creation of a warp knitted fabric with a pattern or design without increasing the thickness of the fabric, or a warp knitted fabric with partially different stretch properties.

[0052] The present invention may be embodied in various other forms, including improvements, modifications, and variations based on the knowledge of a person skilled in the art, without departing from the spirit of the invention. Furthermore, within the scope of producing the same action or effect, any of the features specifying the invention may be substituted with other technology, and an integrally configured feature of the invention may be composed of multiple components, or an integrally configured feature of the invention consisting of multiple components may be embodied. [Explanation of symbols]

[0053] 1. Non-elastic yarn 10 Supporting organizations 2. First elastic thread 20 First insertion tissue 3 Second elastic thread 30 Second Insertion Tissue 4. Third elastic thread 40 Third Insertion Tissue CR round trip course A Between courses (between a round trip course and the next course) B Between courses (between a round trip course and the course before) C (between courses other than A and B)

Claims

1. A support structure in which inelastic yarns are knitted in predetermined courses while being swung to other wales, and needle loops are formed in all courses; a first insertion structure in which the first elastic yarn is inserted in a zigzag pattern for each course; a second insertion structure in which the second elastic yarn is inserted in a zigzag pattern for each course; a third insertion structure in which the third elastic yarn is inserted in a zigzag pattern for each course; A stretchable warp knitted fabric knitted in combination of The support structure has a round-trip course in which the inelastic yarn is swung to the maximum in another wale, and in the next course the inelastic yarn is swung in the opposite direction and returns to the original wale, the first elastic yarn of the first insertion structure is inserted together with the inelastic yarn between all courses, the second elastic yarn of the second insertion structure is inserted on the same wale between the reciprocating course and the course next to the reciprocating course, and is inserted together with the inelastic yarn between the reciprocating course and the course immediately preceding the reciprocating course, The third elastic yarn of the third insertion structure is inserted together with the inelastic yarn between the reciprocating course and the course next to the reciprocating course, and is inserted on the same wale between the reciprocating course and the course immediately preceding the reciprocating course.

2. An elastic warp knitted fabric as described in claim 1, characterized in that the second elastic yarn and / or the third elastic yarn are swung to other wales between courses other than between the round trip course and the next course and between the round trip course and the previous course.

3. 3. The stretchable warp knitted fabric according to claim 1 or 2, wherein the elasticity of the second elastic yarn and the third elastic yarn is smaller than the elasticity of the first elastic yarn.

4. 3. The stretchable warp knitted fabric according to claim 1 or 2, wherein the support structure includes a modified structure produced by a jacquard knitting machine.

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