Ultra high molecular weight polyethylene filament bundle / spandex double-sided tuck stitch structure cut-resistant knitted sportswear fabric and method of making same

Abstract

The application provides a kind of super high molecular weight polyethylene filament bundle / spandex double-sided tuck structure cut-resistant knitted sportswear and a preparation method thereof.The preparation method comprises feeding the first high-performance fiber filament bundle and spandex bare wire after twisting or doubling into a weaving device to form a front organization and a back organization;And feed the second high-performance fiber filament bundle to form a tuck structure;Control the weaving device to weave according to the preset knitting method to obtain a fabric with a double-sided tuck structure, and obtain a cut-resistant knitted sportswear after setting treatment.By the above-mentioned mode, the application can utilize the synergistic effect between the fiber material, the feeding mode and the fabric organization structure, so that the obtained cut-resistant knitted sportswear has good deformation resilience, softness, surface smoothness and other wearability while achieving the European standard EN388:2016 level three standard in cut resistance, effectively balancing the cut resistance and wearability to meet the application requirements of short track speed skating uniforms.

Description

Technical Field

[0001] This invention relates to the field of textile fabric technology, and in particular to a cut-resistant knitted sports fabric with an ultra-high molecular weight polyethylene filament bundle / spandex double-sided loop structure suitable for short track speed skaters' competition uniforms, and its preparation method. Background Technology

[0002] In designing competition suits for short track speed skaters, designers must consider not only the aesthetics, warmth, and comfort of the clothing, but also its protective capabilities. This is because athletes can reach speeds of up to 50 km / h during competitions, and given the limited space on the track, athletes are prone to pushing and shoving. Furthermore, the skates used in short track speed skating are extremely sharp, and in the event of a collision, there is a high probability that the skates will tear the suit. If a major artery is severed, it can cause massive blood loss in a short period, endangering life. Therefore, competition suits for short track speed skaters not only need to meet the requirements of conventional sportswear—being lightweight, soft, resilient, and skin-friendly—but also need to possess a certain degree of cut resistance.

[0003] However, most commonly used fabrics with good performance characteristics lack cut resistance, while dedicated cut-resistant fabrics usually lack elasticity and breathability, making it difficult to meet the performance requirements. How to make fabrics that combine both cut resistance and performance characteristics to meet the performance requirements of short track speed skaters' competition clothing remains an urgent problem to be solved.

[0004] Patent CN114134607A discloses a high-elasticity, cut-resistant composite yarn, its preparation method, and a cut-resistant fabric containing the composite yarn. The composite yarn has a sheath-core structure, with the sheath yarn being a tow of ultra-high molecular weight polyethylene (UHMWPE) filaments and the core yarn being a tow of spandex filaments. The UHMWPE filaments are a high-performance fiber that provides cut resistance to the fabric, while the spandex filaments possess excellent shrinkage and tensile elasticity, meeting the performance requirements of the fabric. Although this fabric can balance cut resistance and wearability to some extent, its cut resistance level only reaches level 2. Furthermore, the sheath-core structure of the composite yarn in this patent tends to make the fabric feel rough, preventing the formation of a smooth and delicate fabric; its overall performance still needs further improvement.

[0005] In view of this, it is necessary to design an improved cut-resistant knitted sports fabric and its preparation method to solve the above problems. Summary of the Invention

[0006] To address the shortcomings of the existing technology, the present invention aims to provide a cut-resistant knitted sports fabric with a double-sided tucked structure of ultra-high molecular weight polyethylene filament bundle / spandex and its preparation method. The present invention feeds a first high-performance fiber filament bundle and bare spandex yarn together into a weaving device to form a front-and-back structure, and then feeds in a second high-performance fiber filament bundle to form a tucked structure. Following a predetermined weaving method, the fabric is made into a double-sided tucked fabric. This results in a cut-resistant knitted sports fabric that meets the cut resistance standard of European standard EN388:2016 Level 3 while also possessing good deformation resilience, softness, and surface smoothness, thus meeting the application requirements of short track speed skating competition apparel.

[0007] To achieve the above objectives, the present invention provides a method for preparing a cut-resistant knitted sports fabric with a double-sided loop structure of ultra-high molecular weight polyethylene filament tow / spandex, comprising the following steps:

[0008] The first high-performance fiber filament bundle, after being twisted or combined, and the bare spandex yarn are fed into the weaving equipment together to form the front and back structures; the second high-performance fiber filament bundle is fed in to form the loop structure.

[0009] The weaving equipment is controlled to weave according to a preset weaving method to obtain a fabric with a double-sided loop structure; the fabric with a double-sided loop structure includes the front weave, the back weave, and the loop structure disposed between the front weave and the back weave for connecting the front weave and the back weave;

[0010] After the fabric with a double-sided loop structure is subjected to a shaping treatment, a cut-resistant knitted sports fabric is obtained.

[0011] As a further improvement of the present invention, the preset weaving method includes the following steps:

[0012] The first looping system's upper needles are withdrawn, and all lower needles are engaged, using the simultaneously fed first high-performance fiber filament bundle and spandex to knit a row of plain knit stitches on the right side.

[0013] The second looping system utilizes a second high-performance fiber filament bundle to form loops through upper and lower low-heel needles;

[0014] The third looping system exits the work when the lower needle is withdrawn, and all the upper needles participate. Using the first high-performance fiber filament bundle and spandex, a row of reverse plain knit is knitted.

[0015] The fourth looping system utilizes a second high-performance fiber filament bundle to form loops through upper and lower high-heel needles.

[0016] As a further improvement of the present invention, both the first high-performance filament bundle and the second high-performance filament bundle are made of ultra-high molecular weight polyethylene.

[0017] As a further improvement of the present invention, the twist of the first high-performance filament bundle after twisting or twisting is 100 to 200 twists / meter.

[0018] As a further improvement of the present invention, the fineness of the first high-performance fiber filament bundle after twisting or ply twisting is 200-400D, the fineness of the bare spandex yarn is 40-70D, and the fineness of the second high-performance fiber filament bundle is 50-100D.

[0019] As a further improvement of the present invention, the fineness of the second high-performance fiber filament bundle is 50D.

[0020] As a further improvement of the present invention, the mass ratio of the high-performance fiber filament bundle to the spandex bare filament is 20-40:4-7.

[0021] As a further improvement of the present invention, the weaving equipment is a double-sided circular knitting machine.

[0022] As a further improvement of the present invention, the syringe size of the double-sided circular knitting machine is 16 to 18.

[0023] As a further improvement of the present invention, the shaping process includes, in sequence, pre-shaping, boiling, dehydration, drying and heat-shaping processes.

[0024] To achieve the above objectives, the present invention also provides a cut-resistant knitted sports fabric with a double-sided loop structure of ultra-high molecular weight polyethylene filament bundle / spandex. This fabric is prepared according to the preparation method provided by any of the above technical solutions and has a double-sided loop structure, including a first high-performance fiber filament bundle, a second high-performance fiber filament bundle, and bare spandex filament.

[0025] The beneficial effects of this invention are:

[0026] This invention provides a method for preparing a cut-resistant knitted sports fabric with a double-sided loop structure of ultra-high molecular weight polyethylene filament bundles and spandex. The method involves feeding a high-denier first high-performance fiber filament bundle and bare spandex filaments together into a weaving device to form the front and back weaves. A low-denier second high-performance fiber filament bundle forms a loop structure. By following a predetermined weaving method, the fabric is made into a double-sided looped fabric, with the loop structure hidden between the front and back weaves, connecting the two layers. This synergistic effect of fiber materials, feeding method, and fabric structure results in a cut-resistant knitted sports fabric that meets the European standard EN388:2016 Level 3 cut resistance standard while also possessing good deformation resilience, softness, and surface smoothness. It effectively balances both cut resistance and wearability, meeting the application requirements of short track speed skating competition apparel. Furthermore, the preparation method provided by this invention is simple and easy to scale up for industrial production. The process does not use commonly used cut-resistant materials such as glass fiber and metal wire, making it more skin-friendly and promising for future applications. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the fiber feeding method in the preparation method of the cut-resistant knitted sports fabric provided by the present invention.

[0028] Figure 2 This is a schematic diagram of the weaving structure of the cut-resistant knitted sports fabric provided by the present invention.

[0029] Figure 3 This is a photograph of the cut-resistant knitted sports fabric prepared in Example 1.

[0030] Figure 4 A schematic diagram of the weaving structure of the cut-resistant knitted sports fabric provided for Comparative Example 2. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0033] Additionally, it should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] This invention provides a method for preparing a cut-resistant knitted sports fabric with a double-sided loop structure of ultra-high molecular weight polyethylene filament tow / spandex, comprising the following steps:

[0035] The first high-performance fiber filament bundle, after being twisted or doubly twisted, and the bare spandex filament are fed together into the weaving equipment to form the front and back structures; the second high-performance fiber filament bundle is then fed in to form a loop structure; a schematic diagram of the feeding method is shown below. Figure 1 As shown.

[0036] The weaving equipment is controlled to weave according to a preset weaving method to obtain a fabric with a double-sided loop structure; the fabric with a double-sided loop structure includes the front weave, the back weave, and the loop structure disposed between the front weave and the back weave for connecting the front weave and the back weave;

[0037] After the fabric with a double-sided loop structure is subjected to a shaping treatment, a cut-resistant knitted sports fabric is obtained.

[0038] The second high-performance fiber filament bundle used to form the loop structure should not be too thick, otherwise it will cause unevenness on the fabric surface and affect the appearance of the fabric. Preferably, the fineness of the second high-performance fiber filament bundle is 50–100D.

[0039] In existing technologies, to fuse high-performance fiber filament bundles with bare spandex yarns to form fabrics, spandex is typically used as the core yarn and the high-performance fiber filament bundle as the sheath yarn, forming single-layer or double-layer covered yarns. If ordinary single-layer covered yarns are used, the yarn is prone to untwisting, and the twist formed by the high-performance fibers can easily result in a rough fabric feel. Even with double-layer covered yarns, the surface of the woven fabric remains relatively rough due to the presence of twist, lacking the smooth and delicate fabric texture. Therefore, this invention feeds the twisted or co-twisted first high-performance fiber filament bundle and the bare spandex yarn together into the weaving equipment, which not only simplifies the process but also improves the fabric's hand feel while ensuring cut resistance.

[0040] Specifically, the first high-performance fiber filament bundle after twisting or plying is formed by twisting or plying ultra-high molecular weight polyethylene filament bundles. Too high a twist makes the yarn too stiff, while too low a twist results in poor yarn cohesion; therefore, a twist of 100-200 twists / meter is preferred. Twisting a single yarn ensures a certain degree of cohesion, reducing the likelihood of snagging during weaving. If several relatively fine yarns are plyed (100-200D), the thickness of the plyed yarn is the same as that of the twisted single yarn, but the filaments within the plyed yarn have greater freedom of movement. During blade cutting, the filaments easily slide on the blade surface, causing the force point on the fiber to constantly change, thus delaying fiber breakage and improving the fabric's cut resistance.

[0041] Preferably, the fineness of the first high-performance fiber filament bundle after single-strand twisting is 200-400D, and the fineness of the spandex bare filament is 40-70D. If the first high-performance fiber filament bundle is too coarse, although it can increase the fabric thickness and improve the cut resistance, it will reduce the hand feel and affect the smoothness and delicacy of the fabric. If the first high-performance fiber filament bundle is too fine, it will not be conducive to improving the cut resistance.

[0042] When using ultra-high molecular weight polyethylene (UHMWPE) filament bundles as the first and second high-performance fiber filament bundles, it is preferable to use UHMWPE filament bundles with a fineness of 400D as the first high-performance fiber filament bundle, and preferably to use UHMWPE filament bundles with a fineness of 50D as the second high-performance fiber filament bundle. This enables the final fabric to meet the European standard EN388:2016 Level 3 standard, thus satisfying the needs of practical applications.

[0043] Preferably, the mass ratio of the first high-performance fiber filament bundle to the bare spandex filament is 20-40:4-7. If the spandex proportion is too large, it will affect the cut resistance of the fabric; if the spandex proportion is too small, its tension will be insufficient to gather the high-performance fiber filament bundle together, which will affect the elasticity of the fabric.

[0044] Preferably, the weaving equipment is a double-sided circular knitting machine, and the cylinder size of the double-sided circular knitting machine is 16 to 18. If the cylinder size is too large, the first high-performance fiber filament bundle and the bare spandex yarn cannot be fed in together; if the cylinder size is too small, the fabric cannot form a tightly gathered structure, which is not conducive to improving the cut resistance.

[0045] Based on this, the preset weaving method includes the following steps:

[0046] The first looping system's upper needles are withdrawn, and all lower needles participate, using the simultaneously fed first high-performance fiber filament bundle and spandex bare yarn to knit a row of plain knit on the front.

[0047] The second looping system utilizes a second high-performance fiber filament bundle to form loops through upper and lower high-heel needles;

[0048] The third looping system exits the work when the lower needle is withdrawn, and all the upper needles participate, using the first high-performance fiber filament bundle and spandex bare yarn fed in simultaneously to knit a row of reverse plain knit;

[0049] The fourth looping system utilizes a second high-performance fiber filament bundle to form loops through upper and lower high-heel needles.

[0050] The weaving diagram formed according to the above method is as follows: Figure 2 As shown.

[0051] The double-sided loop weave structure formed by the above weaving method consists of two layers of fabric on the front and back sides connected together by loop weave. Compared with the conventional single-layer weave, it can increase the thickness of the fabric and improve the cut resistance. Compared with the double-layer fabric woven by weaving one open and one closed, the double-sided loop weave structure in this invention is more compact. Moreover, the loop weave structure, rather than the double rib structure, connects the front and back fabrics together, which can add a set of fiber bundles arranged along the thickness direction between the front and back weaves, thereby further improving the cut resistance and enhancing the blunting effect of the fabric on the blade.

[0052] The setting process includes pre-setting, scouring, dehydration, drying and heat setting processes, which are used to shrink the fabric and increase its elasticity.

[0053] This invention also provides a cut-resistant knitted sports fabric with a double-sided loop structure of ultra-high molecular weight polyethylene filament bundles and spandex. This fabric is prepared according to the method provided in the above technical solution and has a double-sided loop structure, including a first high-performance fiber filament bundle, a second high-performance fiber filament bundle, and bare spandex yarn. This cut-resistant knitted sports fabric meets the European standard EN388:2016 Level 3 standard for cut resistance while also possessing good deformation resilience, softness, and surface smoothness, effectively balancing both cut resistance and wearability, and meeting the application requirements of short track speed skating competition apparel.

[0054] The following describes the ultra-high molecular weight polyethylene filament bundle / spandex double-sided loop structure cut-resistant knitted sports fabric and its preparation method provided by the present invention, with reference to specific embodiments.

[0055] Example 1

[0056] This embodiment provides a method for preparing a cut-resistant knitted sports fabric with an ultra-high molecular weight polyethylene filament tow / spandex double-sided loop structure, comprising the following steps:

[0057] S1. Twist the untwisted 400D ultra-high molecular weight polyethylene filament bundle using a doubling twister to a twist of 150 twists / meter, to obtain the twisted 400D ultra-high molecular weight polyethylene filament bundle.

[0058] S2. The twisted 400D ultra-high molecular weight polyethylene filament bundle and 70D spandex bare yarn obtained in step S1 are fed together into an 18-needle double-sided circular knitting machine to form the front and back structures. The mass ratio of the twisted ultra-high molecular weight polyethylene filament bundle to the spandex bare yarn is 40:7. A 50D ultra-high molecular weight polyethylene filament bundle is fed in to form a coiled structure.

[0059] S3. The fabric with a double-sided loop structure is woven using the following method:

[0060] The first looping system's upper needles are withdrawn, and all lower needles participate, using simultaneously fed 400D ultra-high molecular weight polyethylene filament bundles and 70D spandex bare yarns to knit a row of plain knit stitches on the front.

[0061] The second looping system utilizes 50D ultra-high molecular weight polyethylene filament bundles to form a loop structure through upper and lower low heel needles;

[0062] The third looping system's lower needles exit the work, and the upper needles participate fully, using the simultaneously fed 400D ultra-high molecular weight polyethylene filament bundles and 70D spandex bare yarns to knit a row of reverse plain knit.

[0063] The fourth looping system utilizes 50D ultra-high molecular weight polyethylene filament bundles to form a loop structure through upper and lower high heel needles;

[0064] S4. The fabric formed in step S3 is subjected to pre-setting, scouring, dehydration, drying, and heat setting treatments in sequence to obtain a weight of 657 g / m². 2 Cut-resistant knitted sports fabric, actual product image as shown Figure 3 As shown.

[0065] Example 2

[0066] This embodiment provides a method for preparing a cut-resistant knitted sports fabric with a double-sided loop structure of ultra-high molecular weight polyethylene filament bundle / spandex. Compared with Embodiment 1, the only difference is that the 400D ultra-high molecular weight polyethylene filament bundle in step S1 is replaced with two 200D ultra-high molecular weight polyethylene filament bundles, which are twisted together at a twist of 150 twists / meter. The remaining steps are the same as in Embodiment 1, and will not be repeated here.

[0067] The cut-resistant knitted sports fabric prepared in this embodiment has a weight of 656 g / m². 2 .

[0068] Example 3

[0069] This embodiment provides a method for preparing a cut-resistant knitted sports fabric with a double-sided loop structure of ultra-high molecular weight polyethylene filament bundle / spandex. Compared with Embodiment 1, the only difference is that the 400D ultra-high molecular weight polyethylene filament bundle in step S1 is replaced with four strands of 100D ultra-high molecular weight polyethylene filament bundles, which are twisted together at a twist of 150 twists / meter. The remaining steps are the same as in Embodiment 1, and will not be repeated here.

[0070] The cut-resistant knitted sports fabric prepared in this embodiment has a weight of 663 g / m². 2 .

[0071] Example 4

[0072] This embodiment provides a method for preparing a cut-resistant knitted sports fabric with a double-sided loop structure of ultra-high molecular weight polyethylene filament bundle / spandex. Compared with Embodiment 1, the only difference is that the 400D ultra-high molecular weight polyethylene filament bundle in step S1 is replaced with a 200D ultra-high molecular weight polyethylene filament bundle. The remaining steps are the same as in Embodiment 1 and will not be repeated here.

[0073] The cut-resistant knitted sports fabric prepared in this embodiment has a weight of 501 g / m². 2 .

[0074] Comparative Example 1

[0075] This comparative example provides a method for preparing a cut-resistant knitted sports fabric with a double-sided loop structure of ultra-high molecular weight polyethylene filament bundle / spandex double-covered yarn. Compared with Example 2, the difference is that two strands of 200D ultra-high molecular weight polyethylene filament are first covered with 70D bare spandex filament to prepare a double-layer covered yarn. Then, the double-layer covered yarn is fed into an 18-needle double-sided circular knitting machine, and then knitted and shaped in the same way as in Example 2. The specific steps are the same as in Example 2, and will not be repeated here.

[0076] The cut-resistant knitted sports fabric prepared in this comparative example has a weight of 921 g / m². 2 .

[0077] Comparative Example 2

[0078] This comparative example provides a method for preparing a cut-resistant knitted sports fabric with an ultra-high molecular weight polyethylene filament tow / spandex double-sided rib structure. The difference from Example 1 lies in the change of the weaving method, resulting in a fabric with a double-sided rib structure. A schematic diagram of its weaving structure is shown below. Figure 3 As shown. Specifically: the first and second loop-forming systems knit a horizontal double rib, and the third and fourth loop-forming systems knit a plain knit structure on the front side of the knit stitches in the purl and twill stitches respectively. All loop-forming systems use twisted 400D ultra-high molecular weight polyethylene filament bundles and 70D spandex bare yarns fed in simultaneously for knitting. The remaining steps are consistent with Example 1 and will not be repeated here.

[0079] The cut-resistant knitted sports fabric prepared in this comparative example has a weight of 593 g / m². 2 .

[0080] To compare the performance differences between the cut-resistant knitted sports fabrics prepared in the various embodiments and comparative examples, the cut resistance, thickness, resilience, softness, and surface smoothness of the fabrics were tested.

[0081] 1. Cut resistance test

[0082] The standard for characterizing the cut resistance is BS EN 388:2016 "Protective Gloves against Mechanical Risks". In its cutting test, a circular blade makes a reciprocating rotational movement on the material under a normal pressure of 5 N within a specified distance (50 mm). The rotational direction of the circular blade is opposite to the rolling direction, and the maximum sinusoidal cutting speed of the blade edge is 100 mm / s. The test method is as follows: Fix the sample on an aluminum foil on a rubber pad without stretching the sample. Each sample is tested 5 times. The sharpness of the blade should be tested before and after each test to avoid inaccurate test results due to different blade sharpness. After comparing the number of rotational test cycles of the待测样品 (to be determined sample) with that of the standard material, the anti-cutting index I is converted through a calculation formula to determine the anti-cutting grade. When 0 < I ≤ 2.5, it is anti-cutting level 1; when 2.5 < I ≤ 5, it is anti-cutting level 2; when 5 < I ≤ 10, it is anti-cutting level 3; when 10 < I ≤ 20, it is anti-cutting level 4; when I ≥ 20, it is anti-cutting level 5. The anti-cutting index is a dimensionless value, and the larger the value, the better the cut resistance.

[0083] After testing the anti-cutting indices of the cut-resistant knitted sport fabrics prepared in Examples 1 to 4 and Comparative Examples 1 to 2, the results are shown in Table 1.

[0084] Table 1 Cut Resistance of Fabrics Prepared in Examples 1 to 4 and Comparative Examples 1 to 2

[0085]

[0086] As can be seen from Table 1, the fabrics provided in Examples 1 to 3 can all meet the European standard EN388:2016 level 3 standard, all showing excellent cut resistance, being able to meet the requirements of practical applications, and the multi-strand twisted filament bundle is more cut-resistant than the single-strand twisted filament bundle. In addition, Example 4 shows that the fabric prepared from 200D ultra-high molecular weight polyethylene filament bundle can only meet the level 2 standard, indicating that the areal density and fabric thickness largely determine the cut resistance. From Comparative Example 1 and Example 2, it can be seen that the cut resistance of the double-covered yarn fabric of ultra-high molecular weight polyethylene filament bundle and spandex is higher than that of the fabric with polyethylene filament and spandex fed in simultaneously, because the areal density of the fabric increases and the number of fibers participating in cut resistance per unit volume increases. From Comparative Example 2 and Example 1, it can be seen that the cut resistance of the double rib fabric is slightly lower than that of the double-sided tuck stitch structure. This is because connecting the front and back fabrics through the tuck stitch structure rather than the double rib structure can add a new group of yarns arranged along the thickness direction between the front and back tissues, making the fabric thicker and strengthening the passivation effect of the fabric on the blade.

[0087] 2. Thickness Test

[0088] Thickness tests were performed on six examples according to standard GB / T3820-1997 "Determination of thickness of textiles and textile articles". An area of ​​2000 mm² was used. 2 The presser foot was used to apply a pressure of 1 kPa for 30 seconds. Each sample was tested 5 times. The thicknesses of the five fabrics are shown in the table below:

[0089] Table 2 Fabric thickness tests in Examples 1-4 and Comparative Examples 1-2

[0090]

[0091] A comparison of Examples 1-3 shows that, with the same denier, the thickness of the UHMWPE fiber fabric is similar. Since Example 4 was prepared from 200D filament bundles, its thickness is smaller compared to Examples 1-3. Comparative Examples 1 and 2 show that the double-wound fabric of UHMWPE filament bundles and spandex is thicker than the fabric fed with both polyethylene filaments and spandex simultaneously. This is because in the double-wound fabric, the UHMWPE filaments are wrapped, and the actual denier of the double-wound fabric is higher than 200D+200D+70D, resulting in a higher area density and greater thickness. Comparative Examples 2 and 1 show that the double rib fabric is slightly thinner than the double-sided tucked structure because the tucked structure of the 50D filaments makes the fabric thicker.

[0092] 3. Resilience test

[0093] The elastic recovery performance was characterized by elastic elongation, elastic recovery rate, and plastic deformation rate. A constant load test was conducted according to standard FZ / T70006-2004, "Test Method for Tensile Elastic Recovery Rate of Knitted Fabrics." A pre-tension of 1 N was applied, and a load of 50 N was applied to the sample at a stretching rate of 100 mm / min. The sample was held for 1 minute, then returned to the starting point at a speed of 50 mm / min, held for 3 minutes, and then the next test was performed. Each sample was tested 10 times, and the average value was taken.

[0094] The backfill performance of the cut-resistant knitted sports fabrics prepared in Examples 1-4 and Comparative Examples 1-2 was tested, and the results are shown in Table 3.

[0095] Table 3. Fabric elasticity test results of Examples 1-4 and Comparative Examples 1-2

[0096]

[0097]

[0098] A comparison of Examples 1-3 shows that, with the same denier, the elastic elongation, elastic recovery, and plastic deformation rate of ultra-high molecular weight polyethylene fiber fabrics are similar. Fabrics prepared from 200D filament bundles have a lower elastic elongation. Comparative Example 1 and Example 2 demonstrate that using double-wrapped yarn is beneficial for improving the elastic elongation and elastic recovery of the fabric, because in addition to structural characteristics, the double-wrapped yarn itself also possesses a certain degree of elasticity. Comparative Example 2 and Example 1 show that double-ribbed fabrics have better elasticity than double-sided tucked structures.

[0099] 4. Softness test

[0100] According to standard ASTM D1388-14, "Standard Test Method for Stiffness of Fabrics," the bending stiffness of fabrics is tested to characterize their softness. A strip sample is cut to 200mm × 50mm and placed flat on the measuring plane of an electronic stiffness tester. The sample is then slowly pushed forward, gradually detaching one end from the planar support into a cantilever shape. Under the influence of the sample's own weight, when one end bends down to contact a 41.5° inclined plane, the light path is interrupted. The length of the sample extending beyond the support surface at this point is the bending length L2. The bending stiffness B can be calculated from this length, serving as an indicator of fabric softness. Each sample is tested five times. The bending stiffness of the five fabrics is shown in the table below.

[0101] Table 4. Results of fabric softness tests in Examples 1-4 and Comparative Examples 1-2

[0102]

[0103]

[0104] A comparison of Examples 1-3 shows that, with the same denier, the fabric prepared by twisting four 100D yarns together has the lowest bending stiffness. This is mainly because the inter-fiber constraint in the twisted yarns is smaller, making them prone to slippage. According to Example 4, the fabric prepared from 200D filament bundles is the softest. Comparative Example 1 and Example 2 show that using double-wrapped yarn easily improves the bending stiffness of the fabric, making it stiffer, mainly because the yarn is thicker and the fabric is thicker. Comparative Example 2 and Example 1 show that double-rib knit fabric is softer than double-sided tucked structure, mainly because its structure is looser and its thickness is smaller.

[0105] 5. Surface smoothness

[0106] According to standard FZ / T 01054-2012, the coefficient of friction of fabrics was tested. Two samples were cut into two sizes: 63mm×100mm and 200mm×100mm, one horizontally and one vertically, and marked accordingly. The larger sample was placed on the measuring plane of the fabric surface friction coefficient tester and clamped securely. The smaller sample was clamped onto the slider, ensuring alignment and tautness of the slider line. The testing conditions were set as follows: testing speed 100mm / min, reset speed 200mm / min, testing stroke 60mm, and slider weight 1.96N. The test interface was accessed, "Zero" was clicked, and then "Start" was clicked to begin the test. Each sample was tested three times. The above steps were repeated for other samples. The experimental data are shown in the table below.

[0107] Table 5. Test results of fabric friction coefficient in Examples 1-4 and Comparative Examples 1-2.

[0108]

[0109] A comparison of Examples 1-3 shows that, with the same denier, the coefficient of friction of ultra-high molecular weight polyethylene (UHMWPE) fiber fabrics is similar, and the effect of twisted yarn on the surface roughness of the fabric is relatively small. According to Example 4, using 200D UHMWPE filament bundles helps improve the smoothness of the fabric surface. Comparative Examples 1 and 2 show that using double-wrapped yarn easily increases the coefficient of friction, mainly because the twist formed after the yarn is wrapped with spandex makes the yarn surface rougher. Comparative Examples 2 and 1 show that the surface smoothness of double-rib knit fabrics and double-sided tucked fabrics is quite similar.

[0110] In summary, this invention provides a cut-resistant knitted sports fabric with a double-sided loop structure of ultra-high molecular weight polyethylene filament bundle / spandex and its preparation method, relating to the field of textile fabric technology. The preparation method includes feeding a first high-performance fiber filament bundle (with slight twist or double twist) and bare spandex yarn together into a weaving device to form the front and back structures; feeding in a second high-performance fiber filament bundle to form a loop structure; and controlling the weaving device to weave according to a preset weaving method to obtain a fabric with a double-sided loop structure. After setting treatment, the cut-resistant knitted sports fabric is obtained. Through the above method, this invention utilizes the synergistic effect between the filament bundle treatment method, the feeding method, and the fabric structure to obtain a cut-resistant knitted sports fabric that meets the European standard EN388:2016 Level 3 cut resistance standard while also possessing good deformation resilience, softness, and surface smoothness, effectively balancing both cut resistance and wearability to meet the application requirements of short track speed skating competition apparel, and has good application prospects.

[0111] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A method for preparing a cut-resistant knitted sports fabric with a double-sided loop structure of ultra-high molecular weight polyethylene filament tow / spandex, characterized in that, Includes the following steps: The first high-performance fiber filament bundle, after being twisted or combined, and the bare spandex yarn are fed together into the same inlet of the double-sided circular knitting machine to form the front and back structures; the second high-performance fiber filament bundle is fed in to form the loop structure. The double-sided circular knitting machine is controlled to knit according to a preset knitting method to obtain a fabric with a double-sided loop structure; the fabric with a double-sided loop structure includes the front weave, the back weave, and the loop structure disposed between the front weave and the back weave for connecting the front weave and the back weave; After the fabric with the double-sided loop structure is subjected to a shaping treatment, a cut-resistant knitted sports fabric is obtained. The preset weaving method includes the following steps: The first looping system's upper needles are withdrawn, and all lower needles participate, using the simultaneously fed first high-performance fiber filament bundle and spandex bare yarn to knit a row of plain knit on the front. The second looping system utilizes a second high-performance fiber filament bundle to form loops through upper and lower low heel needles; The third looping system exits the work when the lower needle is withdrawn, and all the upper needles participate, using the first high-performance fiber filament bundle and spandex bare yarn fed in simultaneously to knit a row of reverse plain knit; The fourth looping system utilizes a second high-performance fiber filament bundle to form loops through upper and lower high-heel needles.

2. The method for preparing the ultra-high molecular weight polyethylene filament tow / spandex double-sided loop structure cut-resistant knitted sports fabric according to claim 1, characterized in that: Both the first high-performance filament bundle and the second high-performance filament bundle are made of ultra-high molecular weight polyethylene.

3. The method for preparing the ultra-high molecular weight polyethylene filament tow / spandex double-sided loop structure cut-resistant knitted sports fabric according to claim 2, characterized in that: The twist of the first high-performance filament bundle after twisting or twisting is 100~200 twists / meter.

4. The method for preparing the ultra-high molecular weight polyethylene filament tow / spandex double-sided loop structure cut-resistant knitted sports fabric according to claim 1, characterized in that: The fineness of the first high-performance fiber filament bundle after twisting or ply twisting is 200~400D, and the fineness of the bare spandex yarn is 40~70D; the fineness of the second high-performance filament bundle is 50~100D.

5. The method for preparing the ultra-high molecular weight polyethylene filament tow / spandex double-sided loop structure cut-resistant knitted sports fabric according to claim 1, characterized in that: The mass ratio of the first high-performance fiber filament bundle to the bare spandex filament is 20~40 : 4~7.

6. The method for preparing the ultra-high molecular weight polyethylene filament tow / spandex double-sided loop structure cut-resistant knitted sports fabric according to claim 1, characterized in that: The syringe size of the double-sided circular knitting machine is 16 to 18.

7. The method for preparing the ultra-high molecular weight polyethylene filament tow / spandex double-sided loop structure cut-resistant knitted sports fabric according to claim 1, characterized in that: The shaping process includes pre-shaping, boiling, dehydration, drying and heat setting processes in sequence.

8. A cut-resistant knitted sports fabric with a double-sided loop structure of ultra-high molecular weight polyethylene filament tow / spandex, characterized in that: The cut-resistant knitted sports fabric is prepared by the preparation method according to any one of claims 1 to 7, and has a double-sided loop structure, including a first high-performance fiber filament bundle, a second high-performance fiber filament bundle, and bare spandex yarn.

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