Elastic lace fabric free of thermofusible yarns and not easy to unravel

Abstract

An elastic lace fabric free of thermofusible yarns and not easy to unravel, comprising a fabric body, comprising an elastic bottom fabric layer and a pattern layer for forming a main pattern of the fabric body, the bottom fabric layer comprising non-thermofusible yarns Y1, Y2, Y3 and Y4, wherein the non-thermofusible yarns Y1 are non-elastic yarns and are knitted in a chain structure, the non-thermofusible yarns Y2 are elastic yarns and are knitted in a variable weft insertion structure, the non-thermofusible yarns Y3 are elastic yarns and are knitted in a chain structure, and the non-thermofusible yarns Y4 are elastic yarns and are knitted in a weft insertion structure; and the pattern layer is formed by non-thermofusible yarns Y5 knitted on the surface of the fabric body in a variable weft insertion or loop-forming structure, wherein the non-thermofusible yarns Y1 and Y3 form plaiting structures, and Y1 and Y3 form loops corresponding to all needle positions during knitting on the basis of the movement modes and sequence of loop-forming elements. The present invention improves the stretching performance of a lace fabric in warp and weft directions, has the advantage of being not easy to unravel after being cut, and can be widely applied to underwear, corselets, and sports and leisure clothes.

Description

A lace fabric that is elastic, has no thermal fuse and is not easy to fall apart Technical Field

[0001] The invention relates to a lace fabric, in particular to a lace fabric which is elastic, has no thermal fuse and is not easy to fall apart. Background Art

[0002] At present, the fabrics produced by traditional lace technology generally have a large warp width and a small weft width (usually 30%-40%), and they all have the defect of being easy to unravel after cutting. These problems have directly caused it to be severely restricted in clothing applications. In order to effectively improve the defect of traditional fabrics being easy to unravel after cutting, lace manufacturers are also constantly debugging and exploring at the technical level, such as:

[0003] The lace knitted fabric disclosed in the CN101426971A communiqué is a lace knitted fabric knitted with hot-melt yarn and a method for manufacturing the same. The lace knitted fabric after the knitting operation is heated at a temperature lower than the melting temperature of the chain stitch yarn but not lower than the melting temperature of the hot-melt yarn, so that the hot-melt yarn partially melts. A portion of the melted portion adheres to the chain stitch yarn and inserts into the yarn. As a result, the connection state of each yarn can be maintained, thereby preventing the wear of the yarn. In addition, the melt-bonded portion can be formed by breaking the hot-melt yarn. Therefore, even if a portion of the chain stitch yarn constituting the chain stitch texture is segmented, the wear of the chain stitch texture can be prevented by the stuck portion of the hot-melt yarn, so that the wear of the chain stitch texture beyond the stuck portion can be prohibited.

[0004] Similar to the above are the fabrics and weaving methods involved in CN 208803234 U, CN 101426971 A, and CN 112368435 A.

[0005] These solutions utilize thermofusible yarns that melt at specific temperatures at the intersections of the loops, preventing unraveling. While this improves the unraveling problem, it also introduces new drawbacks: a stiffer feel and reduced openness. This new issue is even more unacceptable to underwear designers and wearers.

[0006] Through multiple technical improvements and production debugging, the fabric body disclosed in the present invention has the advantages of warp and weft tensile properties both greater than 80% (LTD03 standard) in both directions, and is not easy to fall apart after cutting. It can be widely used in underwear, corsets, sports and casual wear. Technical issues

[0007] The present invention provides a lace fabric that is elastic, has no thermal fuse and is not easy to unravel, has good anti-unraveling performance, and improves the warp and weft tensile properties of the lace fabric. Technical Solutions

[0008] Disclosed is an elastic lace fabric without thermal fuses that is not easy to fall apart. The fabric comprises a fabric body, an elastic base mesh layer, and a pattern layer forming a main pattern of the fabric body. The base mesh layer comprises non-thermal-melting yarns Y1, Y2, Y3, and Y4, wherein the non-thermal-melting yarn Y1 is a non-elastic yarn woven in a chain-knit structure, the non-thermal-melting yarn Y2 is an elastic yarn woven in a variable weft inlay structure, the non-thermal-melting yarn Y3 is an elastic yarn woven in a chain-knit structure, and the non-thermal-melting yarn Y4 is an elastic yarn woven in a weft inlay structure. The pattern layer is formed by non-thermal-melting yarn Y5 woven on the surface of the fabric body in a variable weft inlay or loop-forming structure. The non-thermal-melting yarns Y1 and Y3 form a plaited yarn structure, and the non-thermal-melting yarns Y1 and Y3 form a coil corresponding to each needle position during the knitting process according to the movement mode and sequence of the loop-forming mechanism.

[0009] As a further improvement, the non-thermofusible yarn Y2 passes through each needle position during the knitting process and is cross-connected with the non-thermofusible yarns Y2, Y3 and Y4 to be knitted into a coil.

[0010] As a further improvement, the non-thermofusible yarn Y4 passes through each needle position during the knitting process and is cross-connected with the non-thermofusible yarns Y1, Y2 and Y3 to be knitted into a coil.

[0011] As a further improvement, the linear density of the non-thermofusible yarn Y1 is 20D-70D, preferably 30D.

[0012] As a further improvement, the non-thermofusible yarn Y2 is a core-spun yarn, which includes core yarn spandex and covering layer filaments. The linear density of the covering layer filaments is 20D-140D, preferably 40D, and the linear density of the core yarn spandex is 10-70D, preferably 20D.

[0013] As a further improvement, the draft ratio of the non-thermofusible yarn Y2 is in the range of 2.0-3.6, preferably 3.0.

[0014] As a further improvement, the non-thermofusible yarn Y3 is spandex with a linear density of 20D-70D, preferably 30D.

[0015] As a further improvement, the non-thermofusible yarn Y4 is spandex with a linear density of 70D-560D.

[0016] As a further improvement, the non-thermofusible yarn Y5 is a patterned yarn, which is a yarn of a single material, or a yarn composed of at least two different materials and colors, and has a linear density of 40D-840D.

[0017] As a further improvement, the pattern layer includes a plurality of concave and convex parts woven and formed on the surface of the bottom mesh layer. Beneficial effects

[0018] Compared with the prior art, the present invention has the following technical effects:

[0019] By interweaving the non-thermofusible yarns Y1, Y2, Y3, and Y4, the contact area between Y1 and Y3 at the loop increases from Y1 or Y3 to Y1 + Y3, thus increasing the contact area. The retraction of Y3 increases the pressure on Y1 at the loop, increasing the friction between the loops of Y1 and preventing yarn unraveling between the loops. At the same time, Y1 and Y3 jointly contribute to the warp width of the fabric. Y1 and Y2 interweave to form the fabric's base. Y2 gives the base mesh a jacquard appearance and determines the weft elasticity. When Y2 passes through the loops formed by Y1 and Y3, it forms a cross-shaped friction surface with Y1 and Y3, generating friction. Y4, together with Y1 and Y3, determines the warp width of the fabric, ensuring the fabric's stretch and comfort.

[0020] Through the above weaving structure, after LTD03 standard testing, the tensile properties in both warp and weft directions under a force of 7.5lbf are greater than 80% in both directions, and it has the advantage of not being easy to fall apart after cutting. It can be widely used in underwear, corsets, sports and casual wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the cross-sectional structure of the present invention;

[0022] FIG2 is a schematic diagram of the motion organization structure of the bottom mesh layer yarn of the present invention;

[0023] Figure 3 is a schematic diagram of the movement of the patterned yarn of the present invention;

[0024] Figure 4 is a schematic diagram of the physical properties curve of the fabric of the present invention;

[0025] Figure 5 is a schematic diagram of the length change of the yarn from the stretched state to the finished state;

[0026] FIG6 is a schematic diagram of the friction of the contact surfaces of the non-thermofusible yarns Y1, Y2, and Y3 of the present invention.

[0027] Reference numerals:

[0028] Bottom mesh layer 1, pattern layer 2. Best Mode for Carrying Out the Invention

[0029] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention.

[0030] In the description of the present invention, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like are used to indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0031] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, removable connections, or integral connections. They may refer to mechanical connections or electrical connections. They may refer to direct connections or indirect connections through an intermediary, and they may refer to internal communication between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0032] Example 1

[0033] As shown in Figures 1-4, a lace fabric with elasticity but no thermal fuse and not easy to fall apart includes a fabric body, an elastic base mesh layer 1 and a pattern layer 2 forming the main pattern of the fabric body, the base mesh layer 1 includes non-thermal-melt yarns Y1, Y2, Y3 and Y4, wherein the non-thermal-melt yarn Y1 is a non-elastic yarn and is woven in a chain-knit structure, the non-thermal-melt yarn Y2 is an elastic yarn and is woven in a variable weft-insertion structure, the non-thermal-melt yarn Y3 is an elastic yarn and is woven in a chain-knit structure, and the non-thermal-melt yarn Y4 is an elastic yarn and is woven in a weft-insertion structure; the pattern layer 2 is formed by non-thermal-melt yarn Y5 woven in a variable weft-insertion or loop-forming structure on the surface of the fabric body, the non-thermal-melt yarns Y1 and Y3 form a yarn-filling structure, and coils are formed in the fabric body corresponding to each needle position in the weaving process. The fabric body is formed by weaving five non-thermofusible yarns together. In addition to the five non-thermofusible yarns mentioned above, a sixth or seventh non-thermofusible yarn can be added if necessary. In addition to the base mesh layer and the pattern layer, the pattern layer can be multi-layered for greater aesthetic appeal. The specific process for the pattern layer can be flexibly selected, ultimately resulting in patterns such as crown buds, lantern buds, or other shapes to meet different decorative needs.

[0034] All yarns used in the weaving process are non-thermofusible yarns. Non-thermofusible yarns Y1 and Y3 are in a plating structure, and according to the movement and sequence of the loop-forming mechanism, loops are formed in each row, or at each needle position, during the weaving process. This creates a more secure connection structure and improves the performance of preventing unraveling.

[0035] The weaving of the above five non-thermofusible yarns with corresponding process structures effectively prevents unraveling while also improving tensile properties in the warp and weft directions. Non-thermofusible yarns Y1, Y4, and Y3 are arranged along the warp direction, while non-thermofusible yarn Y2 is arranged along the warp direction and offset in the weft direction according to the process design to form a weft extension line. Specifically, the contact area between non-thermofusible yarns Y1 and Y3 at the loop is changed from Y1 or Y3 to a combination of Y1 and Y3, from a single yarn contact to a joint contact of two yarns, thus increasing the contact area. The retraction of Y3, as an elastic yarn, increases the pressure on the non-thermofusible yarn Y1 at the loop, increasing the friction between the loops, preventing unraveling between the loops, and thus enhancing the unraveling resistance of the entire fabric. Furthermore, non-thermofusible yarns Y1 and Y3 are woven into loops along the warp direction, which has an effect on the warp width of the fabric. Y1 and Y2 are interwoven to form the fabric's base. While Y2 is routed along the warp direction, it is offset in the weft direction according to the process design to form a weft extension line. At the same time, it is interwoven with Y1 in the warp direction to increase the reliability of the connection. Y2 gives the bottom mesh layer a jacquard appearance and affects the weft elasticity of the fabric body. Y2 is used to pull the fabric body in the weft direction. When Y2 passes through the loop formed by Y1 and Y3, it presents a cross-shaped friction surface with Y1 and Y3 and generates friction. There is also friction between Y1 and Y3, which increases resistance and further improves the anti-shedding performance, as shown in Figure 6.

[0036] Y4, along with Y1 and Y3, runs along the warp direction, thus jointly determining the warp width of the fabric and ensuring its stretch comfort. Figure 5 shows the transition from a stretched state to a relaxed state, with the stretched state on the left and the relaxed state on the right. In the stretched state, non-thermofusible yarn Y1 is straight, while Y3 and Y4 are stretched. In the relaxed state, Y3 and Y4 are straightened after retraction, while Y1 is slightly arched due to the retraction of Y3 and Y4. Y3 and Y4 also shorten due to retraction. The straight-line length of each corresponding yarn segment a1 to b1 in the relaxed state is shorter than the straight-line length of each yarn segment a to b in the stretched state (due to the arching). Furthermore, each yarn in the relaxed state is thicker than its stretched counterpart, with yarns Y1 and Y3 becoming thicker due to their shortening. Y5 forms the fabric's main pattern, enhancing its aesthetic appeal.

[0037] During the knitting process, the non-thermo-fusible yarn Y2 passes through each needle position and is cross-connected with the non-thermo-fusible yarns Y2, Y3 and Y4 to be knitted into a coil. During the knitting process, the non-thermo-fusible yarn Y4 passes through each needle position and is cross-connected with the non-thermo-fusible yarns Y1, Y2 and Y3 to be knitted into a coil.

[0038] In addition, for the selection of each yarn, the following conditions have better performance.

[0039] The linear density of the non-thermofusible yarn Y1 is 20D-70D, preferably 30D. The non-thermofusible yarn Y2 is a core-spun yarn, which includes a core yarn spandex and a covering layer filament, the covering layer filament linear density is 20D-140D, preferably 40D, and the core yarn spandex linear density is 10-70D, preferably 20D.

[0040] The draft ratio of the non-thermofusible yarn Y2 is in the range of 2.0-3.6, preferably 3.0, which forms a better pulling force, can form a better contact with the non-thermofusible yarns Y1 and Y3, and generate friction.

[0041] The non-thermofusible yarn Y3 is spandex with a linear density of 20D-70D, preferably 30D. The non-thermofusible yarn Y4 is spandex with a linear density of 70D-560D.

[0042] The non-thermofusible yarn Y5 is a patterned yarn, which is a yarn made of a single material, or a yarn made of at least two different materials and colors, and has a linear density of 40D-840D.

[0043] Of the non-thermofusible yarns used in this application, only non-thermofusible yarn Y1 is non-elastic; all other yarns are elastic, ensuring good elasticity throughout the fabric. The fabric's anti-loosening properties are achieved by interweaving the yarns. In particular, non-thermofusible yarn Y2 connects through yarns Y1 and Y3, while yarn Y4 also connects to both yarns Y1 and Y3, resulting in excellent overall tightness.

[0044] As a production example, the following is:

[0045] The present invention adopts the following method when specifically weaving:

[0046] 1. Yarn warping:

[0047] 1) Warping of core-spun yarn and filament yarn:

[0048] Warping machine model: Karl Mayer DS 21 / 30 NC-2, negative yarn feeding.

[0049] Warping temperature: 23℃ Warping humidity: 65%

[0050] 2) Warping of spandex:

[0051] Warping machine model: Karl Mayer DSE-H21 / 30 NC-2, positive yarn feeding.

[0052] Warping temperature: 24℃ Warping humidity: 78%

[0053] 2. Weaving

[0054] Machine model: LRJ 83 / 1B, gauge: E24

[0055] According to the expected development goals, various parameters such as machine pulling, yarn feed amount, etc. are reasonably adjusted to ensure smooth startup.

[0056] 3. Yarn selection and threading

[0057] Y1: PA6 30D / 68F SD FDY full penetration;

[0058] Y2: PA6 40D / 12F / 1 SD DTY single bag PU 20D full wear;

[0059] Y3: PU 30D full wear;

[0060] Y4: PU 140D full wear;

[0061] Y5: PA6 140D / 48F / 1*2 TB DTY yarn threading according to pattern requirements;

[0062] 4. Production process

[0063] Rough open width washing → 195℃ pre-dyeing → overflow dyeing → 160℃ finishing

[0064] 5. Finished product tensile test

[0065] Test standard: LTD03 7.5lbf

[0066] Test conditions: tensile speed 10 inches / minute, return speed 20 inches / minute

[0067] Clamp width is 3 inches and clamp distance is 12.7 cm

[0068] Test results: L: 91%, W: 95%, see Figure 4.

[0069] The lace fabric of the present invention has a bidirectional tensile performance of greater than 80% in both warp and weft directions under the LTD03 standard and a force of 7.5 lbf, and has the advantage of not being easily unraveled after cutting, and can be widely used in underwear, corsets, sportswear and casual wear.

[0070] It should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A lace fabric with elastic and non - heat - melt filaments and not easily fraying, including a fabric body, characterized in that, it includes an elastic bottom net layer and a pattern layer forming the main pattern of the fabric body. The bottom net layer includes non - heat - melt yarns Y1, Y2, Y3, and Y4. Among them, non - heat - melt yarn Y1 is a non - elastic yarn and is woven in a chain stitch structure. Non - heat - melt yarn Y2 is an elastic yarn and is woven in a changing weft - inserting structure. Non - heat - melt yarn Y3 is an elastic yarn and is woven in a chain stitch structure. Non - heat - melt yarn Y4 is an elastic yarn and is woven in a weft - inserting structure. The pattern layer is formed by non - heat - melt yarn Y5 woven on the surface of the fabric body in a changing weft - inserting or looping structure. Non - heat - melt yarns Y1 and Y3 form a laid - in structure, and these non - heat - melt yarns Y1 and Y3 form loops corresponding to each needle position according to the movement mode and sequence of the looping parts during the knitting process.

2. The lace fabric with elastic and non - heat - melt filaments and not easily fraying according to claim 1, characterized in that, during the knitting process, the non - heat - melt yarn Y2 passes through each needle position and is cross - connected with non - heat - melt yarns Y2, Y3, and Y4 to jointly knit into loops.

3. The lace fabric with elastic and non - heat - melt filaments and not easily fraying according to claim 1, characterized in that, during the knitting process, the non - heat - melt yarn Y4 passes through each needle position and is cross - connected with non - heat - melt yarns Y1, Y2, and Y3 to jointly knit into loops.

4. The lace fabric with elastic and non - heat - melt filaments and not easily fraying according to claim 1, characterized in that, the linear density of the non - heat - melt yarn Y1 is 20D - 70D, preferably 30D.

5. The lace fabric with elastic and non - heat - melt filaments and not easily fraying according to claim 1, characterized in that, the non - heat - melt yarn Y2 is a core - spun yarn, which includes a core yarn of spandex and a covering layer of filament. The linear density of the covering layer of filament is 20D - 140D, preferably 40D, and the linear density of the core yarn of spandex is 10 - 70D, preferably 20D.

6. The lace fabric with elastic and non - heat - melt filaments and not easily fraying according to claim 1, characterized in that, the draw ratio range of the non - heat - melt yarn Y2 is 2.0 - 3.6, preferably 3.

0.

7. The lace fabric with elastic and non - heat - melt filaments and not easily fraying according to claim 1, characterized in that, the non - heat - melt yarn Y3 is spandex, and the linear density is 20D - 70D, preferably 30D.

8. The lace fabric with elastic and non - heat - melt filaments and not easily fraying according to claim 1, characterized in that, the non - heat - melt yarn Y4 is spandex, and the linear density is 70D - 560D.

9. The lace fabric with elastic and non - heat - melt filaments and not easily fraying according to claim 1, characterized in that, the non - heat - melt yarn Y5 is a fancy yarn, which is a single - material yarn, or a yarn composed of at least two different materials and colors, and the linear density is 40D - 840D.

10. The lace fabric with elastic and non - heat - melt filaments and not easily fraying according to claim 1, characterized in that, the pattern layer includes a number of concave - convex parts knitted and formed on the surface of the bottom net layer.

Images