Micro elastic trimming tape and method of making same

Abstract

The application relates to the technical field of textile processes, in particular to a micro-elastic edge-cutting woven label and a preparation method thereof. The preparation method comprises the steps of preparing warp yarns, preparing weft yarns, weaving a pre-product, cutting and post-finishing. The micro-elastic edge-cutting woven label is not prone to deformation and edge scattering, has low burrs, soft hand feeling, and is resistant to washing and ironing.

Description

Technical Field

[0001] This application relates to the field of textile technology, and in particular to a micro-elastic woven label with a slit edge and its preparation method. Background Technology

[0002] Woven labels are textile tags sewn onto garments to identify brand, composition, and other information. Edge-cut woven labels are formed by directly cutting the edges using processes such as ultrasonic cutting. Utilizing the heat-melting properties of polyester, the yarns at the edges are bonded together during cutting, eliminating the need for traditional binding, effectively reducing production costs and increasing production efficiency.

[0003] However, cut-edge woven labels have drawbacks such as lack of elasticity, easy fraying, and noticeable burrs. They are also prone to warping and deformation after washing and heating, and the elastic cut edges are easily broken and warped when stretched. These problems seriously affect the service life and appearance quality of cut-edge woven labels, limiting their application in high-end apparel brands. Summary of the Invention

[0004] Based on this, one or more embodiments of this application provide a method for preparing a micro-elastic woven label with cut edges, which has the advantages of low burr, tensile strength, and resistance to deformation and fraying.

[0005] The specific technical solution is as follows:

[0006] Firstly, a method for preparing a micro-elastic woven label with a slit edge is provided, comprising the following steps:

[0007] (1) Preparation of warp yarn: Polyester fiber parallel filaments are twisted at 500 twists / meter-600 twists / meter and subjected to a first heat treatment at 120℃-130℃ to obtain warp yarn with a fineness of 50D-150D;

[0008] (2) Preparation of weft yarn: The first and fourth weft yarns are 60D-100D non-thermal-melting yarns, and the second and third weft yarns are 20D-50D thermal-melting yarns. Their heat shrinkage rate at 130℃-150℃ is 5%-10%.

[0009] (3) Weaving pre-finished product: The front layer is woven with the warp yarn and the first weft yarn, the first intermediate layer and the second intermediate layer are woven with the second weft yarn and the third weft yarn respectively, and the bottom layer is woven with the fourth weft yarn. The four-layer structure is superimposed to form the woven label pre-finished product.

[0010] (4) Cutting: Use a No. 2 or No. 3 blade at a speed of 2m / min-5m / min to cut the pre-finished product with a warp tension of 18g / yarn-35g / yarn to obtain strips;

[0011] (5) Finishing: The cut strips are immersed in a finishing solution with a moisture content of 50%-80%, and then subjected to a second heat treatment at 130℃-150℃ to obtain the micro-elastic cut edge woven label;

[0012] The ratio of the density of the first weft yarn to the sum of the density of the second and third weft yarns is (0.55-0.75):1, and the ratio of the density of the fourth weft yarn to the sum of the density of the second and third weft yarns is (0.55-0.75):1.

[0013] In some embodiments, the polyester fiber parallel filaments are at least one of PBT / PET (polybutylene terephthalate / polyethylene terephthalate) or PTT / PET (polypropylene terephthalate / polyethylene terephthalate), with an elastic recovery rate of 15%-35% and a twisting tension of 25 g / filament to 40 g / filament.

[0014] In some embodiments, the non-thermal filament is lyocell or adhesive.

[0015] In some embodiments, the finishing solution comprises 1 wt%-3 wt% epoxy-modified silicone oil, 5 wt%-8 wt% polyurethane resin, and 0.5%-2% blocked isocyanate.

[0016] In some embodiments, the distance between the interlacing points of the warp and weft yarns in the intermediate layer of the second and third weft yarns is ≤0.20mm.

[0017] In some embodiments, the total density of the weft yarn is 3000D·threads / cm-4200D·threads / cm.

[0018] In some embodiments, the first heat treatment time is 2 to 3 seconds, and the second heat treatment time is 20 to 40 seconds.

[0019] In some embodiments, the cutting is ultrasonic cutting.

[0020] In some embodiments, the overfeed rate in the rolling step is 10%-15%.

[0021] In some embodiments, after the micro-elastic woven label is made, the micro-elastic woven label can be further cut and folded to the required length.

[0022] Secondly, a woven label with cut edges prepared using the above-described preparation method is provided.

[0023] The method for preparing micro-elastic woven labels with trimmed edges in this application effectively solves the problems of lack of elasticity in trimmed woven labels and the issues of easy breakage and warping of hot-cut edges during stretching, as well as the problems of easy fraying and burring of hot-cut edges and warping and deformation after washing and heating. Specifically, by using high-twist bicomponent polyester fiber parallel filaments as warp yarns, a stable longitudinal skeleton is formed; by designing a four-layer structure, the middle layer uses fine denier hot-melt yarn, which forms a self-locking structure during cutting and heat treatment, effectively preventing fraying; by precisely controlling the density ratio of the weft yarns in each layer, the heat shrinkage rate between each layer is matched, and the four-layer symmetrical design of different weft yarns avoids warping and deformation after washing and heating, while also preventing the middle layer colored yarn from showing through to the front layer, and the four-layer symmetrical design of different weft yarns avoids label warping. The trimmed woven labels prepared by this method have the advantages of low burr, tensile strength, and resistance to deformation and fraying, while maintaining good hand feel and elasticity.

[0024] The micro-elastic woven label of this application has the advantages of low burr, tensile strength, and resistance to deformation and fraying, while maintaining good hand feel and elasticity, which can meet the quality requirements of high-end apparel brands for woven labels. Detailed Implementation

[0025] The present application is further described below with reference to embodiments and examples. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the application. Furthermore, it should be understood that after reading the description in this application, those skilled in the art can make various alterations or modifications to the application, and these equivalent forms also fall within the protection scope of the appended claims.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0027] Cut-edge woven labels are a type of woven label product designed using the bonding properties of hot-melt materials during cutting. Existing cut-edge woven labels lack elasticity, have many burrs, and are prone to deformation. Increasing the proportion of hot-melt materials can reduce fraying, but it affects the feel. High-temperature baking can easily cause warping, forming uneven, serrated, wavy edges.

[0028] This application designs a micro-elastic woven label with a slit edge. Through comprehensive control of materials and manufacturing processes, it can effectively reduce burrs, is not easily deformed, has elasticity, is not easily deformed after multiple washes and heating, is not easily broken or warped when stretched and hot-cut, and maintains a good hand feel.

[0029] The method for preparing the micro-elastic edge-cut woven label of this application includes the following steps:

[0030] (1) Preparation of warp yarn: Polyester fiber parallel filaments are twisted at 500 twists / meter-600 twists / meter and subjected to a first heat treatment at 120℃-130℃ to obtain warp yarn with a fineness of 50D-150D;

[0031] (2) Preparation of weft yarn: The first and fourth weft yarns are 60D-100D non-thermal-melting yarns, and the second and third weft yarns are 20D-50D thermal-melting yarns. Their heat shrinkage rate at 130℃-150℃ is 5%-10%.

[0032] (3) Weaving pre-finished product: The front layer is woven with the warp yarn and the first weft yarn, the first intermediate layer and the second intermediate layer are woven with the second weft yarn and the third weft yarn respectively, and the bottom layer is woven with the fourth weft yarn. The four-layer structure is superimposed to form the woven label pre-finished product.

[0033] (4) Cutting: Use #2 or #3 blades at a speed of 2m / min-5m / min and under a radial tension of 18g / piece-35g / piece to cut the pre-finished product to obtain strips;

[0034] (5) Finishing: The cut strips are immersed in a finishing solution with a moisture content of 50%-80%, and then subjected to a second heat treatment at 130℃-150℃ to obtain the micro-elastic cut edge woven label;

[0035] The ratio of the density of the first weft yarn to the sum of the density of the second and third weft yarns is (0.55-0.75):1, and the ratio of the density of the fourth weft yarn to the sum of the density of the second and third weft yarns is (0.55-0.75):1.

[0036] This preparation method effectively solves the problems of inelasticity in cut-edge woven labels and the issues of easy breakage and warping of hot-cut edges in elastic woven labels, as well as the problems of fraying and warping after washing and heating, through specific material selection and structural design. Specifically, it uses parallel long filaments of high-twist bicomponent polyester fibers as warp yarns to form a stable longitudinal skeleton; it designs a four-layer structure, with the middle layer using fine denier hot-melt yarn, forming a self-locking structure during cutting and heat treatment to effectively prevent fraying; and it precisely controls the density ratio of each layer of weft yarns to ensure that the heat shrinkage rate of each layer is matched and that the four-layer symmetrical design of different weft yarn materials avoids warping and deformation after washing and heating, while also preventing the middle layer of colored yarn from showing through to the front layer. The four-layer symmetrical design of different weft yarn materials also prevents the woven label from warping. The cut-edge woven labels prepared by this method have the advantages of low burr, tensile strength, and resistance to deformation and fraying, while maintaining good hand feel and elasticity.

[0037] In some embodiments, the polyester fiber filaments are at least one of PBT / PET or PTT / PET. Due to the significant difference in heat shrinkage rates between PBT / PTT and PET, a permanent three-dimensional crimped spring structure is generated during subsequent heat treatment, resulting in an excellent elastic recovery rate of 15%-35% for the fibers, with a twisting tension of 25-40 g / filament. Appropriate warp material selection and parameter control can provide better elastic recovery performance, allowing the woven label to quickly return to its original shape after stretching, improving user comfort and durability. Controlling the twisting tension within the suitable range of 25-40 g / filament during processing ensures that the elastic structure of the fibers is not damaged. Through this material selection and process control, the woven label ultimately achieves excellent elastic properties: it can quickly return to its original shape after stretching, avoiding the problem of easy loosening and deformation of ordinary woven labels, significantly improving user comfort and durability. Simultaneously, the PET component in the fiber provides the necessary strength and smoothness, ensuring smooth weaving and maintaining a stable finished product appearance.

[0038] In some embodiments, the non-thermal-fusible yarn is lyocell or viscose. These materials offer good hand feel and skin-friendliness, improving the tactile comfort of the woven label; simultaneously, their non-thermal-fusible nature ensures structural stability during cutting and heat treatment, providing support for the thermal-fusible yarn in the intermediate layer.

[0039] In some embodiments, the non-thermolyzable fiber is lyocell or viscose fiber. These regenerated cellulose fibers, with their exceptional softness, silky luster, and natural skin-friendly properties, significantly enhance the wearing comfort and premium feel of woven labels when applied to the skin-contacting surface.

[0040] Its deeper technological value lies in its unique structural formation mechanism: the woven label employs a four-layer heterogeneous yarn structure, with non-meltable yarns (lyocell / viscose) forming the front and back layers, and meltable yarns and their 5%-10% heat-shrinkable and meltable yarns forming the middle layer. These four structural materials exhibit significant differences in thermodynamic properties, particularly in terms of heat shrinkage rate and melting point. During the post-finishing heat treatment process, the non-meltable yarns (lyocell / viscose) maintain their physicochemical stability, neither melting nor undergoing drastic shrinkage, thus providing crucial support as the structural skeleton.

[0041] When heated, the hot-melt yarn melts, creating an adhesive effect. Due to its high thermal shrinkage rate, it shrinks significantly, leading to internal stress accumulation. This shrinkage force field, created by the difference in thermal properties, causes the non-melted yarn to encapsulate the hot-melt yarn. At laser, ultrasonic, or thermal cutting surfaces, the hot-melt yarn forms a dense mesh-like coating structure with cellulose fibers as the skeleton and the bonding phase. This structure fundamentally prevents edge yarn detachment, resulting in a clear, flat, and smooth cut in the woven label, significantly improving product durability and aesthetics.

[0042] In some embodiments, the finishing solution comprises 1 wt%-3 wt% epoxy-modified silicone oil, 5 wt%-8 wt% polyurethane resin, and 0.5%-2% blocked isocyanate. A suitable finishing solution formulation can form a protective film on the fiber surface, improving the woven label's resistance to deformation and washability while maintaining a soft hand feel.

[0043] In some embodiments, the second and third weft yarns are woven with 20D-50D yarns. This design can increase the interlacing points of the interlacing warp and weft yarns in the effective space to avoid fraying, while avoiding excessive density that reduces warp elasticity and preventing the middle layer color from showing through to the front layer.

[0044] In some embodiments, the distance between the interlacing points of the warp and weft yarns in the intermediate layer of the second and third weft yarns is ≤0.20mm. This design of the interlacing points can effectively prevent fraying during washing and improve the structural stability of the woven label.

[0045] In some instances, the second and third weft yarns have a heat shrinkage rate of 5%-10% at 130°C-150°C; this design facilitates the retraction of the heat-cut fusible yarn in the middle layer, the hard-cut edge is covered, and the cut edge cross section forms a network of micropores after retraction, avoiding breakage when the cut edge is stretched.

[0046] In some embodiments, the total weft yarn density is 3000D·threads / cm-4200D·threads / cm. Controlling the weft yarn density within a suitable range ensures the structural stability of the woven label while maintaining a good hand feel. Combined with finishing processes, this provides appropriate elasticity to the cut edges, preventing breakage due to stretching.

[0047] In some embodiments, the first heat treatment time is 2-3 seconds, and the second heat treatment time is 20-40 seconds. Appropriate heat treatment times ensure that the yarn is fully set, that PBT and PTT in the PBT / PET and PTT / PET warp yarns shrink appropriately, and that excessive heat treatment prevents the material and product appearance from becoming uncontrollable.

[0048] In some embodiments, the cutting is ultrasonic cutting. Ultrasonic cutting generates heat during the cutting process, causing the edge yarns to melt and bond together, effectively reducing fraying and burrs.

[0049] In some embodiments, the cutting is ultrasonic cutting, and further, the warp tension is 18 g / stretcher to 35 g / stretcher to avoid excessive warp stretching of polyester fibers PBT / PET and PTT / PET, which can lead to warped edges after hot cutting.

[0050] In some embodiments, the overfeed rate in the padding step is 10%-15%. A suitable overfeed rate ensures that the finishing solution fully penetrates the fabric, improving the finishing effect.

[0051] In some embodiments, a cutting and folding step is also included, which can cut and fold the woven label into a woven label of the desired length.

[0052] The second aspect of this application provides a woven label with trimmed edges prepared using the above-described method. This woven label has the advantages of low burr, tensile strength, and resistance to deformation and fraying, while maintaining good hand feel and elasticity, thus meeting the quality requirements of high-end apparel brands for woven labels.

[0053] The following are some specific examples.

[0054] For experimental parameters not specified in the following specific embodiments, please refer to the guidelines given in this application document first, or refer to experimental manuals or other experimental methods known in the art, or refer to the experimental conditions recommended by the manufacturer.

[0055] The raw materials and reagents involved in the following specific embodiments can be obtained commercially or prepared by those skilled in the art using known methods.

[0056] Example 1

[0057] This embodiment provides a method for preparing the woven label with cut edges according to this application, including the following steps:

[0058] This embodiment provides a micro-elastic edge-cut woven label and its preparation method.

[0059] The preparation method of micro-elastic woven labels includes the following steps:

[0060] (1) Preparation of warp yarn: PBT / PET parallel filaments with an elastic recovery rate of 20% are twisted at 500 twists / meter, and then heated at 125℃ for 2-3 seconds to set the warp yarn; the fineness of the warp yarn is 75D and the tension is 30g / thread.

[0061] (2) Preparation of weft yarns: The first and fourth weft yarns are 60D in fineness and made of lyocell fiber. The weft density of the first and fourth weft yarns is 15 threads / cm, and the density of the front and bottom layers is 900D·threads / cm. The second and third weft yarns are both 30D in fineness. The weft density of the second and third weft yarns is 25 threads / cm. The density of the first intermediate layer is 750 threads / cm, and the density of the second intermediate layer is 750D·threads / cm. The material is hot melt yarn, and the heat shrinkage rate at 130-150℃ is 8%. The density ratio of the first weft yarn to the second and third weft yarns is 0.6:1. The density ratio of the fourth weft yarn to the second and third weft yarns is 0.6:1. The total density of the weft yarns is: 3300 (D·threads / cm) = 15×60 + 25×30 + 25×30 + 15×60 (density = Σ(density of each layer of weft yarn × denier)).

[0062] (3) Weaving the pre-finished product: The woven label is designed with a four-layer structure, including a front layer, a middle layer, and a bottom layer stacked sequentially. The first weft yarn is woven into the front layer, the second and third weft yarns are woven into the first and second middle layers, and the fourth weft yarn is woven into the bottom layer. The weft and warp yarns are loaded into the label weaving machine, with the ratio of the first weft yarn, the sum of the second and third weft yarns, and the fourth weft yarn count being 3:10:3. The pre-finished product is woven according to the pattern using the label weaving machine. The warp and weft interlacing point spacing of the middle layer is 0.2 mm.

[0063] (4) Cutting: Using a #2 blade, cut the pre-finished product with a warp tension of 30 g / yarn at a speed of 3 m / min to obtain cut strips.

[0064] (5) Finishing: The cut strips are impregnated with a finishing solution at a 12% overfeed rate and extruded by rollers. The moisture content of the impregnated cut strips is 65%. The finishing solution contains 2 wt% epoxy-modified silicone oil microemulsion, 6 wt% self-crosslinking nonionic soft polyurethane resin, and 1% blocked isocyanate crosslinking agent. The impregnated woven label cut strips are heated at 140°C for 30 seconds.

[0065] (6) Cutting and folding: Cut and fold the strips obtained in step 5) into the woven label of the length required by the customer.

[0066] Example 2

[0067] This embodiment provides a method for preparing the cut-edge woven label of this application, which is basically the same as that in Embodiment 1, except that: PTT / PET parallel filaments with an elastic recovery rate of 30% are used; the twisting treatment is performed at 600 twists / meter; and the resulting warp fineness is 75D.

[0068] Example 3

[0069] This embodiment provides a method for preparing the woven label with cut edges according to this application, which is basically the same as that in Embodiment 1, except that: the fineness of the first weft yarn and the fourth weft yarn is 100D, and the density of the first and fourth weft yarns is 9 yarns / cm.

[0070] Example 4

[0071] This embodiment provides a method for preparing the woven label with cut edges according to this application, which is basically the same as that in Embodiment 1, except that the weft density of the first and fourth weft yarns is 12.5 threads / cm, and the tightness of both the front and bottom layers is 750D·threads / cm. The density of the second and third weft yarns is 25 threads / cm, and the tightness of the middle layer is 1500D·threads / cm. The tightness ratio of the first, second, and third weft yarns is 0.5:1. The tightness ratio of the fourth weft yarn to the second and third weft yarns is 0.5:1. The total tightness of the weft yarns is 3000D·threads / cm.

[0072] Example 5

[0073] This embodiment provides a micro-elastic woven label with cut edges and its preparation method, which is basically the same as that in Embodiment 1, except that: the non-thermal melt yarn is viscose fiber; the finishing solution contains 1 wt% epoxy modified silicone oil microemulsion, 8 wt% self-crosslinking nonionic soft polyurethane resin, and 0.5% blocked isocyanate crosslinking agent.

[0074] Example 6

[0075] This embodiment provides a micro-elastic woven label with cut edges and its preparation method, which is basically the same as that in Embodiment 1, except that: the warp tension is 40 g / thread; the second heat treatment temperature is 150℃ and the time is 40 seconds.

[0076] Example 7

[0077] This embodiment provides a micro-elastic woven label with cut edges and its preparation method, which is basically the same as that in Embodiment 1, except that: the density of the weft yarn is 4200D·thread / cm; and the spacing between the warp and weft yarn interlacing points in the middle layer is 0.157mm.

[0078] Comparative Example 1

[0079] This comparative example is basically the same as Example 1, except that the ratio of the number of threads in the first weft yarn, the sum of the second and third weft yarns, and the fourth weft yarn is 0.5:0.9:0.5; the second and third weft yarns are both 50D with a density of 13.5 threads / cm; the density of the first and second intermediate layers is 675D·threads / cm, and the total density is 3150D·threads / cm. The interlacing point spacing between the intermediate layer yarns and the warp yarns is 0.37mm.

[0080] Comparative Example 2

[0081] This comparative example is basically the same as Example 1, except that the interlacing distance between the second and third weft yarns and the warp yarns is increased to 0.3 mm, the density of the second and third weft yarns is 16.7 yarns / cm, the density of the first intermediate layer and the second intermediate layer is 500D·yarn / cm, and the corresponding total density is 2800D·yarn / cm.

[0082] Comparative Example 3

[0083] This comparative example is basically the same as Example 1, except that the parallel filaments are twisted at 200 twists / meter; the resulting warp yarn fineness is 75D.

[0084] Comparative Example 4

[0085] This embodiment provides a micro-elastic woven label with cut edges and its preparation method, which is basically the same as that in Embodiment 1, except that the second heat treatment temperature is 120°C and the time is 20 seconds.

[0086] Comparative Example 5

[0087] This embodiment provides a micro-elastic woven label with a cut edge and its preparation method, which is basically the same as that in Embodiment 1, except that the cutting tension is 45 grams per yarn.

[0088] Comparative Example 6

[0089] This embodiment provides a micro-elastic edge-cut woven label and its preparation method, which is basically the same as that in Embodiment 1. The difference is that the second and third weft yarns are both 75D, the tightness of the weft yarn is 15 yarns / cm, the tightness of the second and third weft yarns is 1125D·yarn / cm, the interlacing point of the second and third weft yarns with the warp yarn is 0.33mm, and the total tightness is 4050D·yarn / cm.

[0090] Test methods and metrics:

[0091] Burr assessment: Method: SEM (Scanning Electron Microscopy) is used to observe the edge, and burrs are graded according to length / density (e.g., 0-5). Indicator: Burr grade (≤1 grade is excellent).

[0092] Elasticity properties: Method: Refer to GB / T3923.1 "Tensive Properties of Textiles - Part 1" or ASTM D5034 to determine the elongation at break and elastic recovery rate. Indicators: Elongation 10%-16%, elastic recovery rate ≥90%.

[0093] Washability test: Refer to ISO 6330 or AATCC 135, and observe the appearance changes after 20 washes. Indicators: No frayed edges, no deformation, and no fading after washing.

[0094] Heat stability (heat resistance) method: Refer to AATCC 133, use an iron to press at 150℃ for 5 seconds, and observe whether there is warping or discoloration. Indicator: No warping, no discoloration.

[0095] Feel and skin-friendliness method: subjective rating by 10 people (1-5 points). Indicator: rating ≥ 4 / 5.

[0096] Colorfastness (interlayer hiding power) test method (for evaluating the ability of the front layer to cover the intermediate colored yarn): (a) Sample preparation: A test sample is specially woven in which the first weft yarn (front layer) and the fourth weft yarn (bottom layer) are white non-heat-cut yarns, and the second and third weft yarns (intermediate layer) are black heat-fused yarns. Subsequent processes are consistent with those described in this invention; (b) Measurement: Using a colorimeter (D65 light source, 10° field of view), the chromaticity values ​​(L, a, b) of the white front side of the sample are measured; (c) Calculation: The color difference (ΔE) between the sample and a pure white reference sample (woven only with white yarns) is calculated, ΔE = [(ΔL)] 2 +(Δa) 2 +(Δb) 2 ] 1 / 2ΔL, Δa, and Δb are the differences between the chromaticity values ​​L, a, and b of the sample to be tested and the chromaticity values ​​L0, a0, and b0 of the pure white reference sample, respectively; Index: ΔE ≤ 1.30.

[0097] Edge strength; Method: Use a tensile testing machine to test the peel strength or tensile strength at the cut edge. Target: Edge strength ≥ 5 N / cm.

[0098] Test results:

[0099] Table 1 Test results for each embodiment and comparative example

[0100]

[0101] The test results show that the woven labels of Examples 1-7 exhibit excellent performance in all performance indicators. The burr grade is ≤1, the elastic elongation is between 10.5% and 15%, the elastic recovery rate is ≥95%, there is no frayed edge deformation after 20 washes, good thermal stability, a skin-friendly hand feel score ≥4.0, a colorfastness ΔE <1.3, and an edge strength ≥5.8 N / cm. In Comparative Example 1, because the ratio of the first weft yarn, the sum of the second and third weft yarns, and the fourth weft yarn does not meet the requirements of this application, the interlacing point distance between the middle layer yarn and the warp yarn is 0.37 mm, resulting in frayed edges due to water washing resistance, and the edge strength drops to 5.5 N / cm. Comparative Example 2, due to the increased interlacing distance to 0.3mm, exceeding the requirement of ≤0.20mm in this application, resulted in a total density of 2800, lower than the 3000-4200 D. roots / cm required in this application. This led to slight edge loosening in water wash resistance, a decrease in edge strength to 5.8 N / cm, and an 88% decrease in elastic recovery rate. Comparative Example 3, due to the parallel filaments being twisted at 200 twists / meter, far below the 500-600 twists / meter required in this application, resulted in a significant decrease in elastic elongation and elastic recovery rate, to 9.5% and 85%, respectively. Comparative Example 4, with a second heat treatment temperature of 120℃, lower than 130℃, resulted in a grade 2 burr removal, leading to a significant decrease in elastic elongation and elastic recovery rate to 8.5% and 85%, respectively. Problems included washing deformation, warping, poor hand feel, and a drop in elasticity to 3.8. Comparative Example 5: Excessive tension in the over-cut slitting caused warp yarn elongation, resulting in easily curved and wavy edges, leading to grade 2 burrs, washing deformation, warping, a decrease in hand feel to 3.8, and easy breakage during stretching. Comparative Example 6: The second and third weft yarns were both 75D, with a density of 15 yarns / cm. The density of both the second and third weft yarns was 1125D·yarns / cm, greater than the density of the front layer (900D·yarns / cm). The interlacing point between the second and third weft yarns and the warp yarns was 0.33mm, exceeding the application's 0.2mm; the total density was 4050D·yarns / cm. Washing loose threads occurred because the density of the first middle layer (1125D·yarns / cm) was greater than the front layer's density (900D·yarns / cm), causing the color of the middle layer to seep into the front layer. Compared with the blank sample, the anti-seepage ΔE = 1.80 exceeded the application's ΔE = 1.30.

[0102] The above results show that, through specific material selection, structural design, and process parameter control, this application has successfully solved the problems of easy frayed edges and burrs in cut woven labels and easy warping and deformation after washing and heating, while maintaining good elasticity and hand feel.

[0103] The technical features of the above-described embodiments and examples can be combined in any suitable manner. For the sake of brevity, not all possible combinations of the technical features in the above-described embodiments and examples are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0104] The embodiments described above merely illustrate several implementation methods of this application and should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Furthermore, it should be understood that after reading the above teachings, those skilled in the art can make various alterations or modifications to this application, and the equivalent forms obtained also fall within the protection scope of this application. It should also be understood that technical solutions obtained by those skilled in the art based on the technical solutions provided in this application through logical analysis, reasoning, or limited experimentation are all within the protection scope of the appended claims. Therefore, the protection scope of this patent application should be determined by the appended claims, and the specification can be used to interpret the content of the claims.

Claims

1. A method for preparing a micro-elastic woven label with a slit edge, characterized in that, Includes the following steps: (1) Preparation of warp yarn: Polyester fiber parallel filaments are twisted at 500 twists / meter-600 twists / meter and subjected to a first heat treatment at 120℃-130℃ to obtain warp yarn with a fineness of 50D-150D; (2) Preparation of weft yarn: The first and fourth weft yarns are 60D-100D non-thermal-melting yarns, and the second and third weft yarns are 20D-50D thermal-melting yarns. Their heat shrinkage rate at 130℃-150℃ is 5%-10%. (3) Weaving pre-finished product: The front layer is woven with the warp yarn and the first weft yarn, the first intermediate layer and the second intermediate layer are woven with the second weft yarn and the third weft yarn respectively, and the bottom layer is woven with the fourth weft yarn. The four-layer structure is superimposed to form the woven label pre-finished product. (4) Cutting: Use #2 or #3 blades at a speed of 2m / min-5m / min to cut the pre-finished product under a radial tension of 18g / piece-35g / piece to obtain strips; (5) Finishing: The cut strips are immersed in a finishing solution with a moisture content of 50%-80%, and then subjected to a second heat treatment at 130℃-150℃ to obtain the micro-elastic cut edge woven label; The ratio of the density of the first weft yarn to the sum of the density of the second and third weft yarns is (0.55-0.75):1, and the ratio of the density of the fourth weft yarn to the sum of the density of the second and third weft yarns is (0.55-0.75):

1.

2. The preparation method according to claim 1, characterized in that, The polyester fiber parallel filaments are at least one of PBT / PET or PTT / PET, with an elastic recovery rate of 15%-35% and a tension of 25 g / filament-40 g / filament.

3. The preparation method according to claim 1, characterized in that, The non-thermal filament is Lyocell or adhesive.

4. The preparation method according to any one of claims 1-3, characterized in that, The finishing solution contains 1 wt%-3 wt% epoxy-modified silicone oil, 5 wt%-8 wt% polyurethane resin, and 0.5%-2% blocked isocyanate.

5. The preparation method according to any one of claims 1-3, characterized in that, The distance between the interlacing points of the warp and weft yarns in the intermediate layer of the second and third weft yarns is ≤0.20mm.

6. The preparation method according to any one of claims 1-3, characterized in that, The total density of the weft yarn is 3000D·threads / cm-4200D·threads / cm.

7. The preparation method according to any one of claims 1-3, characterized in that, The first heat treatment time is 2-3 seconds, and the second heat treatment time is 20-40 seconds.

8. The preparation method according to any one of claims 1-3, characterized in that, The cutting is ultrasonic cutting.

9. The preparation method according to any one of claims 1-3, characterized in that, The overfeed rate in the rolling process is 10%-15%.

10. A micro-elastic woven label with cut edges, prepared using the preparation method according to any one of claims 1-9.

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