Knitted lace

Abstract

To provide a knitted lace having a beautiful appearance and good feeling even after being worn.SOLUTION: A chain stitch yarn 21 constitutes a chain stitch texture having a plurality of loop-like portions 25a, 25b. A knitted lace has a constitution including the chain stitch yarn 21, which is formed of composite yarn of polyurethane resin fibers having at least one type of elastic yarn and forms a crossing texture 42 by repeating lateral swinging accordingly, a first insertion yarn 24, which is formed of at least one type selected from elastic polyamide resin fiber that resiliently stretches, polyester resin fiber, semisynthetic fiber, recycled fiber, natural fiber and polyurethane resin fiber and is woven into the chain stitch texture and crosses between adjacent courses, and provides elasticity in wale direction W, and a second insertion yarn 23, which is formed of adhesion yarn that resiliently stretches and is woven into the chain stitch texture and provides elasticity in a course direction C.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a knitted lace. [Background technology]

[0002] A knitted lace according to the prior art is disclosed in, for example, Patent Document 1. In this knitted lace, a covering yarn is woven as an insert yarn across an adjacent chain stitch structure. In this prior art, the covering yarn is a composite yarn in which a covering yarn is wound spirally around a core yarn having heat melting properties, and a knitted lace is proposed in which the core yarn is exposed through the spiral gaps in the covering yarn when stretched. By heating the knitted lace after knitting, a part of the core yarn among the insert yarns melts and solidifies so as to bond other yarns that come into contact through the gaps in the spiral stripes of the covering yarn. This prevents fraying in the knitted lace product.

[0003] Patent Document 2 proposes a knitted lace including a chain stitch yarn, a first insertion yarn that elastically stretches and gives elasticity in the course direction of the chain stitch structure, and a second insertion yarn that elastically stretches and gives elasticity in the wale direction of the chain stitch structure, wherein the chain stitch yarn and the second insertion yarn consist of a core yarn and a covering yarn wound spirally around the core yarn, and the core yarn of the chain stitch yarn and the first insertion yarn are bonded, the chain stitch yarn and the core yarn of the first insertion yarn are bonded, and the chain stitch yarn and the core yarn of the second insertion yarn are bonded; and by heating the knitted lace after knitting, the core yarns are bonded and fraying is prevented. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5697887 [Patent Document 2] Patent No. 6488300 Summary of the Invention [Problem to be solved by the invention]

[0005] In the conventional technology described in Patent Document 1, the thermal bonding yarn is knitted only into the insert yarn, and the insert part of the thermal bonding yarn is knitted with different yarns. This structure reduces the aesthetic appearance after wearing. In contrast, the knitted lace of Patent Document 2, which is designed to knit the thermal bonding yarn into the entire lace instead of just a part of it, improves the fraying prevention function, but has a problem with the strength of the cut surface in the course direction against the course direction, and repeated wearing causes the inserted yarn to shift from the chain knit structure, causing the edge of the lace fabric to tear, which reduces the aesthetic appearance.

[0006] An object of the present invention is to provide a knitted lace which has a good aesthetic appearance and a good texture even after being worn. [Means for solving the problem]

[0007] The present invention relates to a chain knit yarn that constitutes a chain knit structure having a plurality of loop-shaped portions, the chain knit yarn being a composite yarn of two or more types of yarn, at least one of which is made of a composite yarn of a polyurethane resin fiber having elasticity, and which repeats horizontal swinging to form a horizontal crossing structure; a first insertion yarn having elasticity that elastically expands and contracts, the first insertion yarn being made of at least one type selected from polyamide resin fiber, polyester resin fiber, semi-synthetic fiber, regenerated fiber, natural fiber, and polyurethane resin fiber, the first insertion yarn being woven into the chain knit structure to cross between adjacent wales and provide elasticity in the wale direction; The fabric is made of elastically stretchable adhesive yarns, which are woven into the chain knit fabric. Course Direction a second insertion yarn that provides elasticity to the A third insertion yarn made of a thermoplastic resin having elasticity that elastically stretches and is woven into the chain stitch structure to impart elasticity in the course direction, The second insertion yarn is inserted between the sinker loop of the chain stitch yarn and the first insertion yarn, and is bonded at the contact point with the sinker loop of the chain stitch yarn and also bonded to the third insertion yarn.

[0009] The present invention is also characterized in that the chain stitch yarn has adhesiveness.

[0010] In the present invention, the third insertion yarn has adhesiveness.

[0012] The present invention is also characterized in that the first insertion yarn is made of a composite yarn in which two or more types of yarn, at least one of which has adhesiveness, are combined.

[0013] The present invention is characterized in that the second insert yarn has a fineness of 22 decitex to 156 decitex. Effect of the Invention

[0014] According to the present invention, the second insert yarn is knitted into the chain stitch yarn to give it elasticity in the course direction, and the first insert yarn is knitted into the chain stitch structure to give it elasticity in the wale direction. The knitted lace knitted in this way is heat set, so that the second insert yarn with a low melting point is bonded to the chain stitch yarn and partially bonded to the first insert yarn, removing distortion of the entire knitted lace, and producing a knitted lace that is less likely to fray. When the cut surface of the knitted lace of the conventional technology is pulled in the wale direction, the first and second insert yarns try to come out of the insertion parts and appear to have torn, but according to the present invention, the bonded parts between the chain stitch yarn and the chain stitch yarn are strengthened, the chain stitch structure is stabilized, and the bonded points between the first and second insert yarns and the heat-bonded yarn are also formed, albeit partially. As a result, the first and second insert yarns are less likely to come out than in the conventional technology, and when the chain stitch yarn is bonded to the first and second insert yarns, a higher effect is obtained against yarn coming out, and the beauty and texture are good even after wearing.

[0015] According to the present invention, the second insert yarn is knitted into the chain stitch yarn to give it elasticity in the course direction, the first insert yarn is knitted into the chain stitch structure to give it elasticity in the wale direction, and the third insert yarn made of a thermoplastic resin having elasticity that elastically expands and contracts is knitted into the chain stitch structure to give it elasticity in the course direction. The knitted lace knitted in this way is heat set, so that the second insert yarn with a low melting point is bonded to the chain stitch yarn and partially bonded to the third and first insert yarns, removing distortion of the entire knitted lace, and producing a knitted lace that is less likely to fray. When the cut surface of the knitted lace of the conventional technology is pulled in the wale direction, the first to third insert yarns try to come out of the insertion parts and appear to be torn, but according to the present invention, the bonded parts between the chain stitch yarn and the chain stitch yarn are strengthened, the chain stitch structure is stabilized, and the bonded points between the first to third insert yarns and the heat-bonded yarn are also formed, although partially. As a result, the first to third insertion yarns are less likely to come loose than with conventional technology, and when chain stitch yarns are attached to the first to third insertion yarns, an even greater effect is achieved in preventing yarn loss, resulting in a beautiful appearance even after wearing, and maintaining a good texture.

[0016] In addition, with regard to improved kickback properties (the force that tends to shrink when the stretch lace is stretched, the fit), there is less misalignment between the chain knit yarn and the first to third inserted yarns, and the adhesive strength is greater than with conventional techniques using only chain knit yarn. There is less peeling at the adhesive points when stretched, and the material returns to the position it was in before stretching. A yarn that stretches easily (stretch yarn) and a yarn that is slightly less stretchable than the stretch yarn (thermal adhesive yarn) are bonded side by side, so the force that tends to stretch is hindered and the return force is greater than with only the stretch yarn.

[0017] Regarding the improvement of shape stability by improving the adhesive strength between each of the first to third insert yarns and the chain knit yarn, in the thermal bonding of the conventional technology, the combination of yarns that are easy to bond is thermal bonding yarns > thermal bonding yarn and stretch polyurethane yarn > thermal bonding yarn and nylon yarn, and others. In contrast, in the present invention, the main bonding is between the chain knit yarn and the second insert yarn, which is an adhesive elastic yarn, but by running the third insert yarn and the second insert yarn in parallel, the number of bonding points between the third insert yarn and the second insert yarn increases even at a low set temperature, and the number of bonding points between the third insert yarn and the second insert yarn is increased more than the number of bonding points between the chain knit yarn and the second insert yarn, thereby improving the bonding strength between the chain knit yarn and the first to third insert yarns. (For example, the number of bonding points can be increased more than the number of bonding points, thereby improving the bonding strength between the chain knit yarn and the first to third insert yarns.)

[0018] Furthermore, if adhesion is possible even at a low set temperature, the thermal load on each yarn will be reduced, making it possible to improve burst strength. Normally, when the set temperature is low, the setting ability of the third inserted yarn made of polyurethane fiber is weak, and the washing shrinkage rate will be poor, but this can be suppressed by the shape stability of the chain stitch yarn. Naturally, if there are no problems with physical properties such as burst strength and shrinkage rate, it is possible to set at a high set temperature that maintains the shape of each yarn, and by creating stronger adhesion points, it is possible to improve shape stability against the action of external forces caused by wearing and washing.

[0019] Regarding the control of stretchability, the third insertion yarn, which is a stretch yarn of the prior art, has different basic physical properties such as elongation and kickback properties. Although there are individual differences depending on the manufacturer and thickness, the third insertion yarn proposed in the present invention has better elongation and kickback properties than the second insertion yarn. There is a limit to achieving the desired state in terms of stretch and kickback properties using only the thermally bondable stretch yarn, but by combining the fineness of the yarn and the knitting tension of each of the stretch yarns of the prior art and the thermally bondable stretch yarn, the desired stretch feeling and kickback properties can be obtained. The third insertion yarn, which is a stretch yarn, and the second insertion yarn, which is an adhesive yarn, have different stretch properties, and the third insertion yarn stretches better and returns better. In contrast, the second insertion yarn is less likely to stretch and return. Therefore, as described above, by using two yarns, the third insertion yarn and the second insertion yarn, a lace knitted fabric with excellent kickback properties can be provided.

[0020] According to the present invention, the second insertion yarn is inserted between the needle loop of the chain stitch yarn and the first insertion yarn, and the third insertion yarn and the core yarn of the chain stitch yarn are bonded to the second insertion yarn at the contact points with the third insertion yarn and the contact points with the needle loop of the chain stitch yarn, respectively, so that the second insertion yarn, the needle loop of the chain stitch yarn, the first insertion yarn, and the third insertion yarn are bonded with high strength, and yarn slip-out can be suppressed regardless of the direction of the cut surface. This makes it possible to prevent the occurrence of splitting, where the insert yarn comes out of the chain stitch yarn on the cut surface in the wale direction of the lace fabric, causing it to look like it has been torn.

[0021] In addition, according to the present invention, the second insertion yarn is inserted between the sinker loop of the chain knit yarn and the first insertion yarn and is bonded at the contact point with the sinker loop of the chain knit yarn. Therefore, the second insertion yarn is interposed between the sinker loop of the chain knit yarn and the first insertion yarn and is bonded with great adhesive strength, which suppresses yarn loss regardless of the direction of the cut surface and prevents sagging.

[0022] According to the present invention, by using an adhesive yarn for the third insertion yarn, the yarn is inserted between the needle loop of the chain stitch yarn and the first insertion yarn, and the core yarn and each adhesive yarn are bonded at the contact points with the first and second insertion yarns and the needle loop of the chain stitch yarn, so that the second insertion yarn, the needle loop of the chain stitch yarn, the first insertion yarn, and the third insertion yarn are bonded with even greater strength, and yarn slip-out can be suppressed regardless of the direction of the cut surface. This makes it possible to prevent the occurrence of splitting, where the insert yarn comes off the chain stitch yarn on the cut surface in the wale direction of the lace fabric, and looks like it has been torn, thereby improving shape stability and maintaining the beauty of the appearance.

[0023] In addition, according to the present invention, since the first insert yarn is made of a composite yarn made of two or more types of yarn, at least one of which has adhesiveness, at least one of the types melts during heat setting, and the core yarn and each adhesive yarn are bonded between the chain stitch yarn, the third insert yarn, and the second insert yarn, thereby obtaining high adhesive strength. This provides an excellent effect of preventing yarn loss regardless of the cutting direction.

[0024] In addition, according to the present invention, the fineness of the second insertion yarn is 22 decitex (DTEX) to 156 decitex (DTEX), so that it can be adhered to the chain stitch yarn, the third insertion yarn, and the first insertion yarn with high adhesive strength, and it is possible to suppress yarn loss and prevent handling without impairing the transparency and texture. [Brief description of the drawings]

[0025] [Figure 1] 1 is a knitting organization diagram that typically shows the configuration of a knitted lace 1 according to one embodiment of the present invention. [Diagram 2] 2 is a knitting structure diagram of the knitted lace 1 shown in FIG. 1 with a first inserting yarn 24 removed. [Diagram 3] FIG. 2 is a diagram showing the knitting structure of the knitted lace 1 shown in FIG. 1 over two wales. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] Hereinafter, an embodiment of the knitted lace of the present invention will be described with reference to the accompanying drawings.

[0027] FIG. 1 is a knitting structure diagram showing a structure of a knitted lace 1 according to an embodiment of the present invention. FIG. 2 is a knitting structure diagram showing a reduced structure of the knitted lace 1 shown in FIG. 1 with the first insert yarn 24 removed. FIG. 3 is a knitting structure diagram of two wales of the knitted lace 1 shown in FIG. 1. The knitting structure diagrams shown in FIGS. 1 to 3 are shown typically to facilitate understanding of the knitted lace 1, and the actual knitted lace 1 has a small curvature of the first loop-shaped portion 25a and the second loop-shaped portion 25b, and the first to third insert yarns 24, 23, and 22 are in close proximity or in contact with each other. In this embodiment, a knitted fabric knitted with the chain stitch yarn 21 and the first to third insert yarns 24, 23, and 22 is called a lace fabric (or a precursor knitted fabric), and a lace fabric heat-set (heat-treated) is called a knitted lace 1. In another embodiment of the present invention, a knitted lace may be knitted using only the first and second insert yarns 24 and 23 as the insert yarns without using the third insert yarn 22.

[0028] The knitted lace 1 of this embodiment is a warp knitted fabric, a raschel knitted fabric, and also a stretch knitted fabric having elasticity. The knitted lace 1 includes: chain stitch yarn 21 constituting a chain stitch structure having first and second loop-shaped portions 25a, 25b which are a plurality of loop-shaped portions, the chain stitch yarn 21 being made of two or more types of yarn, at least one of which has adhesive properties, i.e., a composite yarn in which a core yarn is covered with a covering yarn by air entanglement or the like, and which forms a run-stop structure 42 by repeated horizontal swings; first insertion yarn 24 being made of at least one type selected from polyamide resin fiber, polyester resin fiber, semi-synthetic fiber, regenerated fiber such as rayon and cupra, natural fiber, and polyurethane resin fiber, which has elastic stretchability, is woven into the chain stitch structure, traverses between adjacent wales, and provides elasticity in the wale direction W; second insertion yarn 23 being made of an elastically stretchable adhesive yarn, which is woven into the chain stitch structure and provides elasticity in the course direction C; and third insertion yarn 22 being made of a thermoplastic resin having elastic stretchability, which is woven into the chain stitch structure and provides elasticity in the course direction C.

[0029] The knitted lace 1 is knitted with a chain stitch yarn 21, a first insertion yarn 24, a second insertion yarn 23, and a third insertion yarn 22, and a plurality of lattices are formed by the yarns 21, 22, 23, and 24, and a plurality of through holes are formed surrounded by each of the lattices. In such a knitted lace 1, a lace pattern is formed by the shape and arrangement of each lattice. The knitted lace 1 also has a pattern part in which the amount of yarn arranged per unit area is dense, and a base part in which the amount of yarn arranged per unit area is sparse, and the pattern pattern is formed by the shape and arrangement of these pattern part and base part. Such a knitted lace 1 with a pattern is used to manufacture knitted lace products such as women's underwear. In addition to the third insertion yarn 22, a first insertion yarn 24 having elasticity is knitted into such a knitted lace 1, and elasticity is imparted in the course direction C and the wale direction W.

[0030] As shown in Figures 1 and 2, the knitted lace 1 includes a chain stitch yarn 21 that forms a raschel-stitched chain stitch structure having a plurality of loop-shaped portions 25a, 25b, and a second insertion yarn 23 that has elasticity to resiliently expand and contract and is knitted into the chain stitch structure to give the chain stitch structure elasticity in the course direction C, and serves as an elastic adhesive yarn that bonds to the core yarn of the chain stitch yarn 21 and the third insertion yarn 22 at the contact point between the chain stitch yarn 21 and the third insertion yarn 22. The knitted lace 1 also includes a first insertion yarn 24 that is knitted to give the chain stitch structure elasticity in the wale direction W. The chain stitch yarn 21 may also be called a warp yarn or a ground knit structure. The first insertion yarn 24 may also be called a weft yarn.

[0031] The second insert yarn 23 is inserted between the needle loop 25a of the chain stitch yarn 21 and the first insert yarn 24, and the third insert yarn 22 and the core yarn of the chain stitch yarn 21 are bonded to the second insert yarn 23 at a contact point 30 with the third insert yarn 22 and a contact point 33 with the needle loop 25a of the chain stitch yarn 21. Here, the part where the yarns contact each other regardless of the angle is referred to as a "contact point," and the part where the yarns cross in the knitting structure is referred to as an "intersection" even if they are not in contact.

[0032] In another embodiment, the second insert yarn 23 may be inserted between the sinker loop 25b of the chain stitch yarn 21 and the first insert yarn 24 and bonded to the sinker loop 25b of the chain stitch yarn 21 at a contact point 28.

[0033] The fineness of the second inserting yarn 23 is preferably 22 decitex (DTEX) to 156 decitex (DTEX). Since the second inserting yarn 23 is an elastic adhesive yarn, if the fineness is less than 22 decitex (DTEX), the transparency and texture are maintained, but the adhesive strength to each yarn is weak, and the anti-snap effect is reduced. Here, the adhesive strength is the resistance to the tensile force acting between the three yarns bonded together. On the other hand, if the fineness is more than 156 decitex (DTEX), the adhesive strength to each yarn is large, and the anti-snap effect is improved, but the transparency is reduced and the texture becomes hard. Therefore, in this embodiment, the fineness of the second inserting yarn 23 is preferably 22 DTEX or more and 156 DTEX or less. More preferably, the second inserting yarn 23 of 44 DTEX is used. If the fineness is 22 DTEX or more and 156 DTEX or less, it is possible to obtain an excellent transparency and a strong adhesive strength of the adhesive part. More preferably, the fineness is 22 DTEX or more and 56 DTEX or less, whereby a more excellent sense of transparency can be obtained and higher adhesive strength can be obtained at the adhesive joint.

[0034] Furthermore, in the knitted lace 1, at the contact point 33 between the chain stitch yarn 21 and the second insert yarn 23, they are firmly bonded due to the adhesiveness of the chain stitch yarn 21 and the adhesiveness of the second insert yarn 23. Also, at the contact point 30 between the second insert yarn 23 and the third insert yarn 22, they are bonded due to the adhesiveness of the second insert yarn 23, although not as strongly as the adhesive strength between the chain stitch yarn 21 and the second insert yarn 23. Also, in the knitted lace 1, some of the contact points 31 between the chain stitch yarns 21 are bonded to each other by utilizing their own adhesiveness. Not all of the contact points 31 between the chain stitch yarns 21 are bonded, but only some of the contact points 31, for example, about 60 to 90%, of all the contact points 31, are bonded. In the knitted lace 1 of this embodiment, the contact point 34 at the intersection of the second insert yarn 23 and the first insert yarn 24, and a part of the contact point 27 between the chain stitch yarn 21 and the first insert yarn 24 are bonded, although not as strongly as the adhesive strength between the chain stitch yarn 21 and the second insert yarn 23 due to the adhesiveness between the chain stitch yarn 21 and the second insert yarn 23. Therefore, the adhesive strength at the contact points of the core yarn of the chain stitch yarn 21 and the second insert yarn 23, etc. is higher than the adhesive strength at the contact point between the core yarn of the chain stitch yarn 21 and the first insert yarn 24.

[0035] The chain stitch yarn 21 of this embodiment is a composite yarn in which two or more kinds of yarns, a core yarn and a covering yarn, are combined, and at least one kind of yarn, the core yarn, is made of a composite yarn having elasticity. For example, polyamide (trade name: nylon) having elasticity that elastically expands and contracts is used as the first insertion yarn 24. In other embodiments, it may be at least one kind of fiber selected from, for example, polyester resin and polyurethane resin, or it may be semi-synthetic fiber, regenerated fiber, or natural fiber. In another embodiment of the present invention, the first insertion yarn 24 may be a composite yarn in which two or more kinds of yarns are combined with a core yarn of a heat-meltable polyurethane resin fiber or the like. The third insertion yarn 22 is a yarn also called spandex, and is a filament yarn made of a thermoplastic resin material having elasticity, for example, made of polyester resin or polyurethane resin.

[0036] The second insertion yarn 23 is made of a filament yarn having elasticity and adhesiveness. In another embodiment of the present invention, the second insertion yarn 23 may be a composite yarn having an elastic adhesive yarn as a core yarn.

[0037] The second insertion yarn 23 in this embodiment is made of polyurethane fiber, and has a melting temperature equivalent to that of the adhesive core yarn of the chain stitch yarn 21 and lower than that of the third insertion yarn 22, making it thermoplastic. In this embodiment, the third insertion yarn 22 and the second insertion yarn 23 are inserted in parallel, further improving the effects described below. In other embodiments, the third insertion yarn 22 and the second insertion yarn 23 may be inserted in a cross-shaped manner.

[0038] As a means for realizing this embodiment, the production of knitted lace 1 is started once preparations for knitting the knitted fabric are completed, such as by selecting the yarns to be used in knitting knitted lace 1, determining the pattern motif to be formed on knitted lace 1 and selecting the pattern yarns that will make up the motif, and completing the design of the knitted fabric to form the desired knitted structure.

[0039] In the knitting process, a precursor knitted fabric, which is a precursor of the knitted lace 1, is knitted using a knitting machine that is a Russell knitting machine. The knitting machine knits the first insertion yarn 24, the third insertion yarn 22, the second insertion yarn 23, etc. into the chain stitch yarn 21 according to a designed knitting sequence, to knit a precursor knitted fabric with a knitting structure similar to that of the knitted lace 1.

[0040] In the precursor knitted fabric, the chain stitch yarn 21, the first insert yarn 24, the third insert yarn 22, and the second insert yarn 23 are elastic. The knitting machine performs a knitting operation with the elastic yarns stretched. The precursor knitted fabric shrinks after knitting due to the restoring force of each yarn knitted in a stretched state, and if this elasticity is maintained until knitted lace 1, knitted lace 1 becomes a stretch knitted lace with elasticity.

[0041] In the heating step, the knitted precursor knitted fabric is heated to a temperature equal to or higher than the melting temperature at which the fibers having adhesiveness to the chain stitch yarn 21 and the second insert yarn 23 exhibit adhesiveness, and lower than the melting temperature of the first insert yarn 24, the yarn not having adhesiveness of the chain stitch yarn 21 (hereinafter also referred to as non-adhesive yarn), and the motif constituent yarn. When the precursor knitted fabric is heated, the precursor knitted fabric is stretched to match the standard pitch and width, and each of the yarns 21, 22, 23, and 24 is heated and melted in the stretched state to have high adhesiveness. The adhesive yarn of the chain stitch yarn 21 (hereinafter also referred to as adhesive yarn) and the second insert yarn 23 are bonded at their contact points, and they are also bonded to the third insert yarn 22 and the first insert yarn 24 at their contact points.

[0042] Therefore, among the intersections of the adhesive yarn of the chain stitch yarn 21 and the third insert yarn 22, the first insert yarn 24, and the second insert yarn 23, the contact points where the adhesive fiber of the chain stitch yarn 21 and the second insert yarn 23 are in contact are particularly strongly bonded. Therefore, the chain stitch yarn 21 crosses between the wales to knit as a chain stitch structure, and again, due to the adhesion at the contact point with the second insert yarn 23, the yarn shift of the chain stitch yarn 21 is eliminated, and the crossover part does not stretch beyond the elongation of the chain stitch yarn 21 against the tensile force in the wale direction W, preventing the opening between the wales, thereby reducing the yarn loss of the first insert yarn 24 and preventing handling.

[0043] 3 is a knitting structure diagram of two wales of the knitted lace 1 before heat setting. The second inserting yarn 23 has a shape as shown in FIG. 1 and FIG. 2 when the knitted lace 1 is being knitted.

[0044] In another embodiment, the first insertion yarn 24 is a composite yarn, in which an elastic core yarn is covered with a covering yarn, for example by air entanglement. The core yarn is a long fiber yarn (filament yarn) made of a thermoplastic synthetic resin, for example a polyurethane yarn. The covering yarn is a long fiber yarn (filament yarn) made of multiple long fibers made of a synthetic resin, for example a polyamide (registered trademark nylon).

[0045] In another embodiment, the first insert yarn 24 is a composite yarn, and in a natural state before knitting when no tension is applied, the first insert yarn 24 is covered with a covering yarn so that the core yarn is not exposed. The first insert yarn 24 is knitted in a stretched state by utilizing the elasticity of the core yarn. The first insert yarn 24 is knitted in a stretched state, and at the bend, the tension of the core yarn causes the core yarn to be exposed from the covering yarn.

[0046] The core yarn of such a first insertion yarn 24 may be a long fiber yarn having adhesive properties.

[0047] As shown in FIG. 3, the chain stitch yarn 21 is chain-knitted to form a first loop-shaped portion 25a and a second loop-shaped portion 25b. The first loop-shaped portion 25a and the second loop-shaped portion 25b are alternately connected and formed in a plurality of rows in the course direction C. Here, the first loop-shaped portion 25a is also called a needle loop, and the second loop-shaped portion 25b is also called a sinker loop. The first loop-shaped portion 25a and the second loop-shaped portion 25b are alternately connected and extend in the course direction C to form a course, thereby forming a chain stitch structure, in other words, a chain stitch structure. In addition, the chain stitch yarn 21 appropriately swings laterally to connect adjacent chain stitch structures in the wale direction W to each other, thereby forming a chain stitch structure having a fraying prevention function. The part where the chain stitch yarn 21 swings laterally is called a run stop part 42.

[0048] Each of the first loop-shaped portions 25a is formed in a roughly inverted U-shape and arranged roughly side-by-side in the course direction C and the wale direction W perpendicular to the course direction C. Each of the first loop-shaped portions 25a opens toward the front course direction C1, which is one side of the course direction. The first loop-shaped portions 25a are lined up in a row in the course direction C to form a wale 26, and the first loop-shaped portions 25a are lined up in a row in the wale direction W to form a course.

[0049] The second loop-shaped portion 25b connects the first loop-shaped portions 25a arranged in the course direction C. For example, one second loop-shaped portion 25b is taken into consideration. One end of the second loop-shaped portion 25b of interest is connected to the end of the first loop-shaped portion 25a in the same stage as the second loop-shaped portion 25b of interest. As the second loop-shaped portion 25b of interest moves from one end to the other end, the first loop-shaped portion 25a in the first stage C1 in the course direction of the second loop-shaped portion 25b of interest is inserted from one side to the other side, extends to the second stage C2 in the course direction, inserts the first loop-shaped portion 25a in the same stage as the second loop-shaped portion 25b of interest from the other side to one side, extends to the second stage C2 in the course direction, and connects to the end of the first loop-shaped portion 25a in the second stage C2 in the course direction of the second loop-shaped portion 25b of interest. In this manner, the loop-shaped portions 25a, 25b are linked together in a chain to form a course extending in the course direction C. Each of the insertion yarns, such as the first insertion yarn 24, the third insertion yarn 22, and the second insertion yarn 23, is sandwiched between the first loop-shaped portion 25a and the second loop-shaped portion 25b, and thereby woven into the course.

[0050] In this embodiment, the course direction C is the vertical direction of the knitted fabric and means the lace knitting direction. The wale direction W is the horizontal direction of the knitted fabric and means the direction intersecting the lace knitting direction. The first loop-shaped portions 25a are arranged in a line in the course direction C and the wale direction W. The first loop-shaped portions 25a arranged in the course direction C and the wale direction W are arranged approximately in contact with a predetermined imaginary plane. In this case, each braiding yarn, such as the first insertion yarn 24, the third insertion yarn 22, and the second insertion yarn 23, which are woven into the chain knit structure, is arranged on one side with respect to the imaginary plane.

[0051] In the embodiment according to the present invention, the direction in which the first insert yarn 24 is arranged with respect to a virtual plane extending along the first loop-shaped portion 25a is referred to as the front direction Z1, and the direction in which the third and second insert yarns 22, 23 are arranged with respect to the first insert yarn 24 is referred to as the back direction Z2. In Figures 1, 2, and 3, the direction toward the paper surface in the thickness direction Z perpendicular to the paper surface is referred to as the front direction Z1, and the direction away from the paper surface in the direction perpendicular to the paper surface is referred to as the back direction Z2.

[0052] On the surface of the knitted lace 1 in the front direction Z1, the first loop-shaped portion 25a is hidden by braiding yarns such as the first insertion yarn 24 and the third insertion yarn 22 and the pattern yarn (not shown). Therefore, the pattern and lace pattern formed on the knitted lace 1 are clearer on the surface of the knitted lace 1 in the front direction Z1 than on the surface of the knitted lace 1 in the back direction Z2.

[0053] For example, the second loop-shaped portion 25b of interest is inserted in the front direction Z1 through the first loop-shaped portion 25a in the front section C1 of the course direction of the second loop-shaped portion 25b, and then inserted in the back direction Z2 through the first loop-shaped portion 25a in the same section C1 of the course direction of the second loop-shaped portion 25b, and is connected to the first loop-shaped portion 25a in the rear section C2 of the course direction.

[0054] The first insertion yarn 24 is a yarn for forming a lace pattern in the chain stitch structure. The first insertion yarn 24 is knitted into each of the wales adjacent in the course direction C, thereby connecting the two wales adjacent in the course direction C. As shown in Fig. 3, the first insertion yarn 24 has a horizontal swing portion 24a extending from one wale to the other wale adjacent in the course direction C, and a knitted portion 24b knitted into the course.

[0055] In the space surrounded by the two horizontal swinging parts 24a arranged in the course direction C and the wales to which the horizontal swinging parts 24a are connected, a through hole 37 is formed which penetrates in the thickness direction of the knitted fabric. This through hole 37 refers to an area where the first insertion yarn 24 does not cross between wales in two or more courses. The shape and arrangement of the through hole 37 are adjusted by selectively arranging the horizontal swinging parts 24a of the first insertion yarn 24. As a result, a lace pattern represented by the arrangement and shape of the through holes 37 can be formed in the knitted lace 1. Here, the through hole 37 surrounded by the horizontal swinging parts 24a and the wales 26 may be filled with a pattern yarn to form a pattern.

[0056] The first insertion yarn 24 extends further in the front direction Z1 than the first loop-shaped portion 25a. The first insertion yarn 24 passes between the preset first loop-shaped portion 25a and second loop-shaped portion 25b and extends in the course direction C. In this embodiment, the first insertion yarn 24 is knitted into the chain stitch structure, and the first insertion yarns 24 are knitted side by side in the course direction C. The position at which the first insertion yarn 24 is knitted is appropriately selected depending on the lace pattern to be formed in the knitted lace 1.

[0057] The adhesive yarn between the second insertion yarn 23 and the chain stitch yarn 21 is realized by a yarn having a lower melting point temperature than the third insertion yarn 22. In this embodiment, a yarn that melts partially in a heated state in a heating step performed after knitting the knitted lace is used. The second insertion yarn 23 is used to prevent fraying and yarn loss of the chain stitch yarn 21 and the first insertion yarn 24 that constitute the knitted lace 1. In this embodiment, the second insertion yarn 23 is realized by a non-covered yarn, i.e., a bare yarn that is not covered by a covering yarn, a so-called bare yarn, and is realized by a polyurethane elastic yarn whose melting temperature is about 140°C or more and 190°C or less. The second insertion yarn 23 is knitted into the chain stitch structure in a state stretched with respect to its natural state.

[0058] The third insertion yarn 22 extends along the course and is woven into all the loop-shaped portions 25a, 25b that constitute the course. Therefore, the third insertion yarn 22 is woven into both the base portion, in which the amount of yarn per unit area is sparse, and the pattern portion, in which the amount of yarn per unit area is denser than that of the base portion, in the chain stitch structure. In this embodiment, the knitted lace 1 has a plurality of third insertion yarns 22, and each third insertion yarn 22 is woven into each course. In this way, the third insertion yarn 22 is woven into the entire area of ​​the chain stitch structure. The method of woven the third insertion yarn 22 into each course may be changed according to the purpose and texture, for example, every other course.

[0059] The third insertion yarn 22 extends further in the front direction Z1 than the first loop-shaped portion 25a and extends further in the back direction Z2 than the second loop-shaped portion 25b. The third insertion yarn 22 advances in a zigzag manner as it advances along the corresponding wale 26 in the course direction C. For example, when the third insertion yarn 22 passes between the first loop-shaped portion 25a and the second loop-shaped portion 25b of interest from the course direction C1 to the course direction rear stage C2, it passes between the first loop-shaped portion 25a and the second loop-shaped portion 25b of the course direction rear stage C2 of the first loop-shaped portion 25a of interest from the course direction front stage C1 to the course direction rear stage C2.

[0060] Immediately after knitting, the third insertion yarn 22 extends in a region in the front direction Z1 further than the first loop-shaped portion 25a, and extends in a region in the back direction Z2 of the knitted lace 1 further than the first insertion yarn 24. Therefore, in a region where the third insertion yarn 22 and the first insertion yarn 24 pass between the same first loop-shaped portion 25a and second loop-shaped portion 25b, the third insertion yarn 22 passes between the first loop-shaped portion 25a and the second insertion yarn 23. In addition, the first insertion yarn 24 passes between the third insertion yarn 22 and the second loop-shaped portion 25b. In this case, as the chain stitch yarn 21 is stretched in the course direction C, the radius of curvature between the first loop-shaped portion 25a and the second loop-shaped portion 25b becomes smaller, and the third insertion yarn 22 is positioned between the first insertion yarn 24 and the first loop-shaped portion 25a, and contacts the first insertion yarn 24 and the first loop-shaped portion 25a.

[0061] In this embodiment, in the region where the third insert yarn 22 and the first insert yarn 24 are inserted between the same first loop-shaped portion 25a and second loop-shaped portion 25b, the third insert yarn 22 and the first insert yarn 24 pass through the first loop-shaped portion 25a and the second loop-shaped portion 25b while crossing each other. Specifically, the third insert yarn 22 passes through the second loop-shaped portion 25b in the same stage in the wale direction as the first loop-shaped portion 25a of interest from the side where the first loop-shaped portion 25a of interest is connected to the second loop-shaped portion 25b in the previous stage C1 in the course direction. The method of weaving the third insert yarn 22 every course may be changed depending on the application and texture, for example, every other course.

[0062] The first insertion yarn 24 passes through the first loop-shaped portion 25a of interest and the second loop-shaped portion 25b in the same stage in the course direction from the side where the first loop-shaped portion 25a of interest is connected to the second loop-shaped portion 25b in the previous stage C1 in the course direction. In this case, by pulling the knitted lace 1 in the course direction C, the third insertion yarn 22 and the first insertion yarn 24 become close to each other in the portion where they both pass through the second loop-shaped portion 25b.

[0063] Also, immediately after knitting, the second insert yarn 23 and the third insert yarn 22 woven into the chain stitch structure are not completely restrained by the chain stitch structure, so that in some of the multiple parts where the second insert yarn 23 and the third insert yarn 22 contact each other, there may be parts where the second insert yarn 23 is disposed further in the front direction Z1 than the third insert yarn 22. Even in this case, in most of the multiple parts where the second insert yarn 23 and the third insert yarn 22 contact each other, the third insert yarn 22 will be disposed further in the back direction Z2 than the first insert yarn 24.

[0064] The non-adhesive yarn of the chain stitch yarn 21 and the first insert yarn 24 are preferably multifilament yarns with a fineness of 78 DTEX or less, particularly 44 DTEX or less. The non-adhesive yarn of the chain stitch yarn 21 is as fine as possible and is not cut when used as a knitted lace product. For example, various fibers such as nylon (polyamide synthetic fiber), rayon, polyester, and cotton can be used. The various yarns used in this embodiment are merely examples, and other types of yarns may be used. Here, the "non-adhesive yarn" refers to a yarn that does not contribute to adhesion, such as a covering yarn that covers a core yarn, when the chain stitch yarn 21 is made of a composite yarn.

[0065] The third insertion yarn 22 is preferably a polyurethane elastic yarn having a fineness of 44 DTEX or more and 470 DTEX or less. In addition to polyurethane elastic yarn, any material having a relatively low melting temperature and thermoplasticity may be used, and other types of elastic fibers, such as adhesive elastic yarn, may be used.

[0066] The knitted lace 1 of this embodiment is heated to a predetermined temperature after knitting that is equal to or higher than the melting temperature of the adhesive yarn of the chain stitch yarn 21 and the second insert yarn 23, and lower than the melting point temperature of the non-adhesive yarn of the remaining chain stitch yarn 21, the third insert yarn 22, and the first insert yarn 24. This causes a part of the adhesive yarn of the chain stitch yarn 21 and the second insert yarn 23 to partially melt. A part of the melted part adheres to the contact points and the non-adhesive yarn of the adjacent chain stitch yarn 21, the first insert yarn 24, and the third insert yarn 22. By solidifying in this state, it is possible to prevent the chain stitch yarn 21 and the first insert yarn 24 that are in contact with the second insert yarn 23 from being separated from the third insert yarn 22 that is adhered to the second insert yarn 23. In addition, each chain stitch yarn 21 and the first insert yarn 24 that are in contact with the third insert yarn 22 can be connected to each other by the third insert yarn 22 that is adhered to the second insert yarn 23. This maintains the connection state of each yarn, and prevents fraying of the yarn.

[0067] According to the knitted lace 1 of this embodiment, the third insert yarn 22 is knitted into the chain stitch structure of the chain stitch yarn 21 to impart elasticity in the course direction C, the first insert yarn 24 is knitted into the chain stitch structure to impart elasticity in the wale direction W, and the second insert yarn 23 is knitted into the chain stitch structure to impart elasticity in the course direction C. By subjecting the knitted lace 1 knitted in this manner to a heat setting process, the second insert yarn 23, which has a low melting point, is bonded to the adhesive yarn of the chain stitch yarn 21 and the third insert yarn 22 and the first insert yarn 24 are also partially bonded, removing distortion of the entire knitted lace 1 and producing a knitted lace 1 that is less likely to fray. When the cut surface of such a knitted lace 1 is pulled in the wale direction W, the first to third insert yarns 24, 23, 22 attempt to come out of the insertion portion, and a part of the cut surface is about to tear, but the bonded portion between the chain stitch yarn 21 and the second insert yarn 23 is strengthened, so the chain stitch structure is stabilized, and the crossover portion 42 of the chain stitch yarn 21 stretches beyond the elongation of the yarn, preventing the opening between the wales W1 and W2, and preventing the first insert yarn 24 from coming out. Also, although partially, the bonded points of the third insert yarn 22, the second insert yarn 23, and the first insert yarn 24 are also formed. As a result, the insert yarns 22 to 24 are less likely to come out than in the conventional technology, and a high suppression effect against loosening is obtained.

[0068] In this way, the bond of the chain stitch structure is strengthened at the bonding portion where the second insert yarn 23 is bonded to the other yarns. Specifically, the first loop-shaped portion 25a and the second loop-shaped portion 25b are strongly bonded to the third insert yarn 22 via the second insert yarn 23. This makes it possible to prevent the second loop-shaped portion 25b from coming loose from the first loop-shaped portion 25a even if a part of the chain stitch yarn 21 is broken. Therefore, the unraveling of the chain stitch yarn 21 is prevented at the bonding portion between the first loop-shaped portion 25a and the second loop-shaped portion 25b, and the unraveling of the chain stitch yarn 21 beyond the bonding portion can be prevented, and as a result, loosening can also be prevented.

[0069] In the knitted lace 1 of this embodiment, the second insert yarn 23 is knitted in a stretched state separately from the third insert yarn 22, so that the second insert yarn 23 of the knitted lace 1 assists the contraction force of the third insert yarn 22 in the heating step after knitting. This makes it possible to impart to the knitted lace 1 greater elasticity and kickback properties, which will be described later, than those of the third insert yarn 22 alone. The elastic yarn constituting such second insert yarn 23 is, for example, a polyurethane elastic yarn.

[0070] The second insert yarn 23 extends closer to the first loop-shaped portion 25a than the first insert yarn 24. The second insert yarn 23 and the third insert yarn 22 pass through the second loop-shaped portion 25b in the same direction and are woven into the chain stitch structure. In other words, the third insert yarn 22 extends and is woven in the same manner as the second insert yarn 23. The second insert yarn 23 is woven into each wale and passes in a zigzag manner as it advances along each wale in the course direction C.

[0071] In another embodiment, the second insert yarn 23 is inserted on the thickness direction Z1 side of the first insert yarn 24 on the thickness direction Z2 side of the second loop-shaped portion 25b of interest, and passes through the second loop-shaped portion 25b in the same stage in the course direction from the first loop-shaped portion 25a of interest from the side where it is connected to the second loop-shaped portion 25b in the previous stage C1 in the course direction. The third insert yarn 22 passes through the second loop-shaped portion 25b in the same stage in the course direction as the first loop-shaped portion 25a of interest from the side opposite to the side where the first loop-shaped portion 25a of interest is connected to the second loop-shaped portion 25b in the previous stage C1 in the course direction. Therefore, in the portion where the second insert yarn 23, the third insert yarn 22, and the first insert yarn 24 all pass through the same loop, the second insert yarn 23 and the third insert yarn 22 cross the first insert yarn 24.

[0072] As in the other embodiments, the same effect as in this embodiment can be obtained even when the second insertion yarn 23 is knitted into the front side of the knitted lace 1. That is, the third insertion yarn 23 adheres to the second loop-shaped portion 25b of the chain stitch yarn 21 and other yarns, thereby preventing the fraying of each yarn. In addition, the second insertion yarn 23 adheres the third insertion yarn 22 to the chain stitch yarn 21, making it difficult for the insertion yarns 22 to 24 to come loose, and a high effect on handling can be obtained.

[0073] In this embodiment, by pulling the knitted lace 1 in the wale direction W, the regions surrounded by the second insert yarn 23 and the first insert yarn 24 approach each other in the wale direction W, and a close portion 50 is generated where the third insert yarn 22, the first insert yarn 24, the second insert yarn 23, the first loop-shaped portion 25a, and the second loop-shaped portion 25b approach each other. By heating the knitted lace 1 while being pulled in the wale direction W in this manner, a part of the second insert yarn 23 can be melted in the close portion 50, and the adhesive force bonding the third insert yarn 22, the first insert yarn 24, the second insert yarn 23, the first loop-shaped portion 25a, and the second loop-shaped portion 25b can be increased. Also in other embodiments, by extending the second insert yarn 23 and the third insert yarn 22 in the same direction, the contact portion where the third insert yarn 22 comes into contact with the second insert yarn 23 can be increased, and the first insert yarn 24 can be more reliably prevented from coming loose.

[0074] In addition, in the knitted lace 1, the second insertion yarn 23 is disposed closer to the first loop-shaped portion 25a than the third insertion yarn 22. When the second insertion yarn 23 and the third insertion yarn 22 proceed in the same direction and are knitted into the loop-shaped portion, the second insertion yarn 23 and the third insertion yarn 22 proceed in parallel, so that the second insertion yarn 23 may be disposed closer to the second loop-shaped portion 25b than the third insertion yarn 22. Also, the third insertion yarn 22 may be disposed side by side with the second insertion yarn 23 in the thickness direction Z. In this way, the positional relationship between the second insertion yarn 23 and the third insertion yarn 22 becomes random, so that the second insertion yarn 23 may be disposed between the third insertion yarn 22 and the first insertion yarn 24. This allows the second insertion yarn 23 and the first insertion yarn 24 to be bonded together, and the chain stitch yarn 21 and the second insertion yarn 23 to be bonded together.

[0075] According to the present invention, when the cut surface of the lace is pulled in the wale direction W, the insertion yarns 22, 23, 24 come out of the insertion parts, causing the lace to tear. However, the bonded parts between the chain stitch yarns 21 are strengthened, the chain stitch structure is stabilized, and the third insert yarn 22, the second insert yarn 23, and the first insert yarn 24 are bonded, albeit partially. As a result, the insert yarns 22, 23, 24 are less likely to come out than in the prior art, and when a thermally bonded composite yarn is used for the first insert yarn 24, this is even more effective in preventing yarn coming out.

[0076] According to the present invention, regarding the improvement of kickback characteristics (the force that tends to shrink when the stretch lace is stretched, the fit) there is less misalignment between the chain stitch yarn 21 and the third insert yarn 22 and second insert yarn 23, and the adhesive strength is increased compared to the prior art where only the chain stitch yarn is bonded, so there is less peeling at the bonded points when stretched, and the lace returns to the position before stretching. Since the easily stretchable yarn (third insert yarn 22) and the yarn that is slightly less stretchable than the stretchable yarn (second insert yarn 23) are woven in parallel into the chain stitch structure, the force that tends to stretch is hindered and the return force is greater compared to when only the third insert yarn 22 is woven.

[0077] Regarding the improvement of shape stability by improving the adhesive strength of each yarn, in the thermal bonding of the above-mentioned conventional technology, the combination of yarns that are easy to bond is as follows: thermal bonding yarns together > thermal bonding yarns and stretch polyurethane > thermal bonding yarns and nylon, etc. In contrast, in the embodiment of the present invention, the main bonding is between thermal bonding yarns together and between thermal bonding yarns and stretch polyurethane, but by running the third insertion yarn 22 and the second insertion yarn 23 side by side, strong bonding is possible even at a lower set temperature.

[0078] In addition, even if the set temperature is low, if adhesion is possible, the burst strength can be improved. The burst strength is a guideline for strength against the ease of tearing by fingers (toes, nails) when actually wearing underwear, but the standard value varies depending on each manufacturer and the use of the clothing. The burst strength is measured using a burst strength tester in accordance with the provisions of JIS L 1096, but it tends to be weak in thin fabrics, fabrics with high elongation, fabrics with low density, and fabrics with large fiber damage due to heat. Normally, when the set temperature is low, the heat setting of the polyurethane thread is weak (weak), and the washing shrinkage rate becomes poor, but this is suppressed by the shape stability of the heat-fused thread. Of course, if there are no problems in terms of physical properties such as burst strength and shrinkage rate, heat setting treatment is possible even at a high set temperature that maintains the shape of each thread, for example, 185 ° C to 195 ° C, and stronger adhesion points are formed, improving shape stability against external forces such as wearing and washing.

[0079] (Regarding stretch control) Conventional stretch yarns and thermally adhesive stretch yarns differ in basic physical properties such as elongation and kickback properties. Although there are individual differences in manufacturers and thickness, normal stretch yarns have better elongation and kickback properties. With thermally adhesive stretch yarns alone, there is a limit to how much stretch and kickback properties can be achieved as desired, but by combining conventional stretch yarns with thermally adhesive stretch yarns, it is possible to obtain the desired stretch and kickback properties.

[0080] The second insert yarn 23 is made of a thermoplastic resin, preferably molten polyurethane, and is therefore easily bonded to the third insert yarn 22, which is made of the same material, by heating. The chain stitch yarn 21 is also a composite yarn containing adhesive fibers, for example, adhesive polyurethane, and the first insert yarn 24 is made of polyamide, rayon, or other materials, and is not easily bonded to the first insert yarn 24. Therefore, only a portion of the intersection as described above is bonded, and the intersection between the chain stitch yarn 21 and the third insert yarn 22 is bonded. Furthermore, the intersections between the chain stitch yarns 21 are also bonded in the same way, so the intersection adhesion rate is higher than the adhesion rate of the contact portions of the other yarns.

[0081] In this manner, in this embodiment, there is a mixture of areas where the chain stitch yarn 21 and the third insertion yarn 22 are thermally bonded to the second insertion yarn 23 and adhered closely to each other, resulting in a knitted lace with little fraying and a supple texture, as will be described later.

[0082] Such a precursor knitted fabric is heated to bond some of the intersections between the chain stitch yarn 21, the third insertion yarn 22, and the second insertion yarn 23 and form the knitted lace 1, and the formed knitted lace 1 is subjected to a heat treatment, also called heat setting, in a scouring or dyeing process to fix the shape and complete the manufacturing procedure for the knitted lace 1. By heating the precursor knitted fabric, the second insertion yarn 23 melts and elasticity is slightly lost, but the second insertion yarn 23 is heated only to a temperature below its melt rupture temperature and is therefore able to maintain its elasticity. Therefore, the knitted lace 1 is elastic.

[0083] According to the knitted lace 1 of this embodiment, the third insert yarn 22 having elasticity is knitted into the chain stitch structure, and elasticity is imparted to the chain stitch structure, so that the knitted lace 1 having elasticity can be realized. In addition, a part of the intersection of the chain stitch yarn 21 with the third insert yarn 22 and the second insert yarn 23 is bonded. This prevents misalignment between the chain stitch yarn 21 and the second insert yarn 23, and between the chain stitch yarn 21 and the third insert yarn 22, and prevents distortion of the lattice. For example, even if an external force due to the manufacturing process such as sewing or cutting the knitted lace, or an external force due to the usage state such as wearing or washing, acts, distortion of the lattice is prevented, the shape of the lattice is maintained, and an aesthetic knitted lace is obtained, and the excellent aesthetic can be maintained for a long time.

[0084] Moreover, the chain stitch yarn 21 and the third insert yarn 22 are bonded by utilizing the adhesiveness of the second insert yarn 23 woven throughout the knitted lace 1, and therefore, instead of using different yarns in parts, visual and tactile uniformity is obtained, and the aesthetics and texture are not impaired. Furthermore, the chain stitch yarn 21, which has the core yarn covered with the covering yarn, is stretched and bonded to other yarns at the exposed part of the core yarn, so that the surface of the covering yarn is not covered with the molten core yarn, and when the knitted lace 1 is brought into contact with the skin, the covering yarn comes into contact with the skin without the molten core yarn coming into contact with the skin. The covering yarn is a filament yarn as described above, and is an assembly of multiple long fibers, so that a soft and gentle feel is obtained and a good texture is maintained. Here, "texture" means the feel, and good texture means a feel that is flexible and soft.

[0085] In addition, unlike the case where all of the intersections between the chain stitch yarn 21 and the second insert yarn 23 and the intersections between the chain stitch yarns 21 are bonded, the elasticity and flexibility are not lost, and a lace fabric with good texture is obtained, which maintains elasticity. Furthermore, the adhesion rate of the intersections between the chain stitch yarn 21 and the second insert yarn 23 is higher than the adhesion rate of the intersections between the chain stitch yarns 21. This keeps the adhesion rate of the entire intersections of the yarns low, maintains flexibility, and prevents as much as possible the misalignment of the chain stitch yarn 21 and the second insert yarn 23, which is likely to affect the distortion of the lattice, and maintains the beauty of the appearance. In this way, an elastic lace fabric with good aesthetics and good texture is obtained. Furthermore, if a knitted lace product is manufactured using such a high-quality lace fabric, a high-quality knitted lace product can be obtained.

[0086] The heating conditions in the above-mentioned heating step are set so that the adhesive yarn (core yarn) of the chain stitch yarn 21 and the second insert yarn 23 melt, while preventing changes in properties, including embrittlement, of yarns other than the adhesive yarn and the second insert yarn 23. The heating conditions in the heating step are preferably set so that the adhesive yarn and the second insert yarn 23 are heated to a temperature at which they can maintain their yarn form. This prevents the molten core yarn from appearing on the surface of the knitted fabric, making it less likely to come into direct contact with the skin.

[0087] Heating conditions, for example, a heating temperature and a heating time are set. Let B1 be the lowest melting temperature at which the adhesive thread (core thread) of the chain knitted thread 21 and the second inserted thread 23 melt, and let D1 be the time until softening when heated at the lowest melting temperature B1. Also, let B2 be the lowest characteristic change temperature at which the characteristics of the threads other than the adhesive thread of the chain knitted thread 21 and the second inserted thread 23 change, and let D2 be the time until the characteristics of the thread change when heated at the lowest characteristic change temperature B2. In this case, in the present embodiment, when the heating temperature in the heating step is B3 and the heating time is D3, it is set such that B1 < B3 < B2 and D1 < D3 < D2. Furthermore, by making B3 as close as possible to the value of B1 and D3 as close as possible to the value of D1, it is possible to easily maintain the form of the adhesive thread of the chain knitted thread 21 and the second inserted thread 23 as threads.

[0088] In the present embodiment, as the adhesive thread (core thread) of the chain knitted thread 21, a polyurethane elastic adhesive thread of preferably 11 DTEX or more and 333 DTEX or less, more preferably 11 DTEX or more and 56 DTEX or less is used. Also, it is heat-treated at a heating temperature of 190°C or less for a heating time of 30 sec or more and 90 sec or less. Thereby, it is possible to melt the adhesive thread of the chain knitted thread 21 and the second inserted thread 23 and prevent the characteristics of the remaining threads from changing.

[0089] For example, when the heating time is constant, if the heating temperature is less than 170°C, the adhesive force between the melted adhesive thread (core thread) of the chain knitted thread 21 and the second inserted thread 23 becomes small. Also, if the heating temperature is set to a high temperature exceeding 195°C, it becomes difficult to maintain the form of the core thread of the chain knitted thread 21 as a thread, and there is a possibility that the characteristics of the threads other than the core thread may change. On the other hand, in the present embodiment, by setting the heating temperature to 190°C or less as described above, it is possible to prevent the above-described problems from occurring.

[0090] The thinner the second inserting yarn 23, the closer the bonded portion is to the point contact point and the smaller it becomes, improving the texture, but the yarn itself has a weak elasticity, which reduces the support of the product, and the thicker the yarn, the larger the bonded portion becomes, impairing the texture. The thinner the second inserting yarn 23, the weaker its strength, and the thicker it is, the stronger it becomes. Therefore, if the second inserting yarn 23 is a thin yarn with less than 22 DTEX, there is a problem that the strength becomes too small, and if it is a thick yarn with more than 333 DTEX, there is a problem that the texture is impaired. By setting the second inserting yarn 23 to 22 DTEX or more and 333 DTEX or less, high adhesive strength is obtained at the bonded portion, the texture is good, and there is no shortage of strength and a good texture is obtained. From the same perspective, it is preferable to set the second inserting yarn 23 to 22 DTEX or more and 156 DTEX or less.

[0091] In addition, as described above, the knitted lace 1 has some of the intersections glued together, which helps prevent the threads from fraying. Therefore, for example, the knitted lace 1 can be cut into any shape, which is called a motif cut or a free cut.

[0092] (Appearance check by DeMacher test) The appearance of Comparative Example 1, which is a conventional product, and Example 1 of this embodiment after the De-Matcher test was confirmed. That is, a test piece of 50 mm in the course direction and 300 mm in the wale direction was taken from the lace knit fabric of the same pattern, and a mark was made in the center of the wale direction W with a width of 100 mm. Using a De-Matcher tester DC-3A manufactured by Daiei Scientific Precision Manufacturing Co., Ltd., the top and bottom of the 100 mm interval in the center of the wale direction were fixed, and 200% elongation was performed at a speed of 200 times / min and 2000 times of stretching. The number and depth of the slits in the center 100 mm in the wale direction of the test piece after the test were measured visually and with a metal ruler. The "slits" referred to here refer to a state in which the insert yarn is removed from the chain stitch yarn 21 at the cut surface of the lace knit fabric in the wale direction W.

[0093] [Table 1]

[0094] In this appearance confirmation test, the test piece used in this Example 1 was the same as the conventional product in terms of yarn usage and knitting conditions, except for the inclusion of the second insertion yarn 23. The first insertion yarn 24 is easier to maintain its shape when heat set than conventional stretch yarns, i.e., polyurethane yarns that are not thermally adhesive, and is easier to maintain its shape when inserted into chain stitch yarns and bent by the tension of other yarns. In this respect, too, the cutting state is stable.

[0095] Although Comparative Example 1 and Example 1 have the same knitting structure, the needle loops, elastic heat-bonding yarn, and jacquard yarn (or motif-forming yarn) are attached to the back of the lace by the sinker loops. Therefore, it was confirmed that the elastic heat-bonding yarn is particularly resistant to misalignment and peeling due to the synergistic effect with the bonding properties.

[0096] As a result, the distance between the chain stitch loops and between adjacent chain stitch yarns is maintained, so that dimensional changes are stabilized.

[0097] (How to prevent lace from rippling) Knitted lace products repeatedly expand and contract in the course direction C and wale direction W due to external forces such as wearing and washing, causing the contact points of each yarn to shift and resulting in distortion and waviness in the thickness direction.

[0098] The reason is that the second insertion yarn 23, which is a stretchable heat-bonding yarn, is easier to maintain its shape when heat-set than a normal stretch yarn (polyurethane yarn with no heat-bonding properties), as mentioned above. When the second insertion yarn 23 is inserted into the chain stitch yarn 21 and the bent state caused by the tension of the other yarns is maintained during heat-setting, the shape of the high and low density parts is stabilized as it is, and there is less shifting of the yarn at the bonding points by the first insertion yarn 24, which reduces the difference in shrinkage depending on whether the motif is present or not, thereby reducing rippling in the thickness direction of the lace due to stretching.

[0099] (Regarding frayed edges) After knitting, there are almost no knitted lace products that are only dyed and heat set. Instead, the knitted lace is cut and sewn or glued to itself or other materials to be manufactured into underwear or outerwear. In recent years, some products have been manufactured in an as-cut state to reduce the appearance of innerwear lines on outerwear and to create a stress-free seam. When simply sewn or glued products are worn or washed, the chain stitch thread 21 may come loose from the sewn or glued area, causing holes. Polyurethane thread may also come loose (loop out between the chain stitches). Depending on the item, measures such as buckling may be taken to prevent this. When the lace is as-cut, some method must be used to maintain the cut surface.

[0100] The reason is that the first insert yarn 24, the third insert yarn 22, the sinker loop 25b, and the needle loop 25a sandwich the second insert yarn 23 and the sinker loop 25b or the needle loop 25a, and by heat setting and bonding in this state, the chain stitch yarn 21 is less likely to fray, and the unraveling of the loops is prevented, so there are fewer holes in the sewn parts. Also, compared to conventional products (polyurethane yarn with no thermal adhesive properties), there is no loss of the elastic thermal adhesive yarn due to use such as wearing and washing. This eliminates the need for measures such as buckling.

[0101] (Maintaining transparency) Knitted lace is at its widest after heat setting, and in most cases, knitted lace 1 shrinks as a result of subsequent processing, wearing, and washing. In that case, the density in the course direction C and the density in the wale direction W become higher, resulting in a loss of transparency. Furthermore, if the knitted lace shrinks while rippling in the thickness direction, it will appear twisted, resulting in a poor appearance. In this way, the density in the course direction C and the wale direction W, which are closely related to dimensional change and shrink less, are stable, allowing the transparency of knitted lace 1 to be maintained.

[0102] In each of the above embodiments, the chain knit yarn basically uses a thermally bonded composite yarn, and the bonding with the second inserted yarn (a bare yarn is used for the thermally bonded yarn) has been mainly described, and an example has been given in which a composite yarn is used only for the chain knit yarn, and yarns of a single material are used for the others. However, in other embodiments of the present invention, when a thermally bonded composite yarn is used for the first inserted yarn, and similarly when a thermally bonded composite yarn is used for the second inserted yarn, the core yarns are bonded to each other, the required tensile strength can be reliably obtained, and fraying can be prevented.

[0103] The above describes the embodiments of the present invention, but the present invention is not limited to these, and various modifications and additions are possible within the scope of the spirit of the invention, such as the insertion direction of the insertion yarn, yarn usage, frequency of crossing chain stitch yarns, and knitting structures such as tulle structure and power net structure. [Explanation of symbols]

[0104] 1 lace 21 Chain stitch 22 Third Insertion Thread 24 First Insertion Thread 23 Second Insertion Thread 25a First loop-shaped portion (needle loop) 25b Second loop-shaped portion (sinker loop) 27 Point of contact between the chain stitch yarn 21 and the first insert yarn 24 28: Point of contact between the second insertion thread 23 and the sinker loop 25b 31 Contact points between the chain stitch yarns 21 30 Point of contact between the second insert yarn 23 and the third insert yarn 22 33: Point of contact between the second insertion thread 23 and the needle loop 25a 34: Point of contact between the second insert yarn 23 and the first insert yarn 24 50 Approach part C Course Direction C1 Course direction front section C2 Course direction rear W wale direction W1 wale turn right W2 Wales to the left Z-lace front and back direction Z1 Race front direction Z2 Race back side

Claims

1. A chain knitting yarn constituting a chain knitting structure having a plurality of loop-shaped portions, the chain knitting yarn being a composite yarn of two or more kinds of yarns, at least one of which is made of a composite yarn of a polyurethane resin fiber having elasticity, and which repeats horizontal swinging to form a horizontal crossing structure; a first insertion yarn having elasticity that elastically expands and contracts, the first insertion yarn being made of at least one type selected from polyamide resin fiber, polyester resin fiber, semi-synthetic fiber, regenerated fiber, natural fiber, and polyurethane resin fiber, the first insertion yarn being woven into the chain knit structure to cross between adjacent wales and provide elasticity in the wale direction; A second insertion yarn is made of a resiliently stretchable adhesive yarn and is woven into the chain stitch structure to provide elasticity in the course direction; A third insertion yarn made of a thermoplastic resin having elasticity that elastically stretches and is woven into the chain stitch structure to impart elasticity in the course direction, The second insertion yarn is inserted between the sinker loop of the chain stitch yarn and the first insertion yarn, and is bonded at the contact point with the sinker loop of the chain stitch yarn and to the third insertion yarn.

2. 2. The knitted lace according to claim 1, wherein the chain stitch yarn has adhesive properties.

3. 3. The knitted lace according to claim 1 or 2, wherein the third insert yarn has adhesive properties.

4. The knitted lace according to any one of claims 1 to 3, wherein the first insertion yarn is made of a composite yarn in which two or more types of yarn, at least one of which has adhesive properties, are combined.

5. 5. The knitted lace according to claim 1, wherein the fineness of the second insert yarn is between 22 decitex and 156 decitex.

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