Uvioresistant and anti-shedding stretch yarn and method for making same

Abstract

The present application relates to a kind of anti-ultraviolet and anti-falling elastic yarn and its preparation method, belong to elastic yarn technical field.The anti-ultraviolet and anti-falling elastic yarn of the present application is composed of anti-ultraviolet wear-resistant layer, skin layer and adhesive node;The anti-ultraviolet wear-resistant layer is composed of titanium dioxide particles and several nylon elastic filaments, the titanium dioxide particles are adhered to the surface of the nylon elastic filament;The skin layer is composed of several polyester elastic filaments;The adhesive node is formed by ultrasonic bonding technology by the anti-ultraviolet wear-resistant layer and the skin layer at several nodes and is adhered.Formation of uniform and firm adhesive node, form structure that is not easy to fall apart, enhance the mechanical properties of yarn, and process flow is simpler.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of elastic yarns, and particularly relates to an ultraviolet-resistant and anti-fuzzing elastic yarn and a preparation method thereof. BACKGROUND

[0002] At present, elastic yarns are widely used, and the existing ultraviolet-resistant elastic fabrics have many multi-layer structures, which can cause the fabric to be thick and poor in thermal comfort when worn outdoors in summer. For example, the Chinese invention CN202210634430.3 discloses an ultraviolet-resistant elastic fabric with a front full-dull yarn and a back elastic yarn. The fabric is a knitted fabric, which is not suitable for outdoor scenes in summer with strong ultraviolet rays. The Chinese invention CN202221956910.3 discloses an outdoor water-repellent antibacterial sunscreen clothing fabric. The fabric has a three-layer structure and has certain ultraviolet resistance but the air permeability is affected, and is mainly used for sunscreen clothing. In addition to the functional development of elastic yarns, improving the characteristic that elastic yarns are prone to fuzzing is also a point of attention. The Chinese invention CN202211153887.9 discloses a linen-like elastic thick and thin needle fabric. The invention prevents the elastic yarn from fuzzing by a unique loop formation structure, but the structure is relatively complex.

[0003] The ultrasonic bonding technology is suitable for plastic, metal, ceramic and other materials, and has been applied in the fields of automobiles, electronics, medical devices and textiles. Among them, the ultrasonic bonding technology is applied in the bonding of non-woven fabrics in the field of textiles. For example, the Chinese invention CN201721796288.3 discloses a kind of ultrasonic bonded fabric. In the invention, the dense fibers are fused to form bonding points on the plane of the two layers of non-woven fabric by using ultrasonic bonding technology. The ultrasonic bonding structure is only suitable for layered fiber film materials with high anisotropy and high density.

[0004] Therefore, it is worth paying attention to how to modify the ultraviolet-resistant elastic yarn by using ultrasonic bonding technology to endow the ultraviolet-resistant elastic yarn with excellent anti-fuzzing performance. SUMMARY

[0005] Therefore, the technical problem to be solved by the application is to overcome the problems in the prior art that the elastic yarn is prone to fuzzing during weaving and use, and the fabric woven by the elastic yarn has insufficient sunscreen performance when used outdoors.

[0006] To solve the above technical problems, the application provides an ultraviolet-resistant and anti-fuzzing elastic yarn and a preparation method thereof. The yarn is fixed into a bundle by using ultrasonic bonding technology, forming uniform and firm bonding nodes, forming a structure that is not easy to fuzz, enhancing the mechanical properties of the yarn, and the process flow is simpler.

[0007] The first object of the present application is to provide an ultraviolet resistant and anti-falling elastic yarn, which is composed of an ultraviolet resistant and wear resistant layer, a skin-friendly layer and a bonding node; the ultraviolet resistant and wear resistant layer is composed of titanium dioxide particles and a plurality of nylon elastic filaments, the titanium dioxide particles are bonded to the surface of the nylon elastic filaments; the skin-friendly layer is composed of a plurality of polyester elastic filaments; the bonding node is formed by bonding the ultraviolet resistant and wear resistant layer and the skin-friendly layer at a plurality of nodes through ultrasonic bonding technology.

[0008] In an embodiment of the present application, the surface of the skin-friendly layer is free of particle adhesion, and has better comfort when in contact with the skin.

[0009] In an embodiment of the present application, the bonding node can prevent the yarn from falling off and enhance the strength of the yarn.

[0010] In an embodiment of the present application, the particle size of the titanium dioxide is 30-90 nm; the titanium dioxide is selected from rutile titanium dioxide and / or anatase titanium dioxide.

[0011] Further, the particle size of the titanium dioxide is 30 nm, 31 nm, 32 nm, 33 nm, 34 nm, 35 nm, 36 nm, 37 nm, 38 nm, 39 nm, 40 nm, 41 nm, 42 nm, 43 nm, 44 nm, 45 nm, 46 nm, 47 nm, 48 nm, 49 nm, 50 nm, 51 nm, 52 nm, 53 nm, 54 nm, 55 nm, 56 nm, 57 nm, 58 nm, 59 nm, 60 nm, 61 nm, 62 nm, 63 nm, 64 nm, 65 nm, 66 nm, 67 nm, 68 nm, 69 nm, 70 nm, 71 nm, 72 nm, 73 nm, 74 nm, 75 nm, 76 nm, 77 nm, 78 nm, 79 nm, 80 nm, 81 nm, 82 nm, 83 nm, 84 nm, 85 nm, 86 nm, 87 nm, 88 nm, 89 nm, 90 nm; or any particle size between any two numerical values.

[0012] In an embodiment of the present application, the specification of the polyester elastic filament is 70D-100D.

[0013] In an embodiment of the present application, the nylon elastic filament is selected from nylon 6 and / or nylon 66, and the specification is 100D-200D.

[0014] In an embodiment of the present application, the number ratio of the filaments of the ultraviolet resistant and wear resistant layer and the skin-friendly layer is 3-4:6-7.

[0015] Further, the number ratio of the anti-ultraviolet wear-resistant layer and the skin-friendly layer is (3:6), (3:7), (4:6), (4:7), or any ratio between any two values.

[0016] In an embodiment of the present application, the distance between the adhesive nodes is 2-5 cm.

[0017] Further, the distance between the adhesive nodes is 2 cm, 3 cm, 4 cm, 5 cm, or any distance between any two values.

[0018] A second object of the present application is to provide a preparation method of the anti-ultraviolet and anti-falling elastic yarn, using an ultrasonic adhesive device as the generating device, comprising the following steps,

[0019] S1, titanium dioxide particles are adhered to the surface of a plurality of nylon elastic filaments by a titanate coupling agent to form titanium dioxide / nylon composite elastic filaments;

[0020] S2, a plurality of titanium dioxide / nylon composite elastic filaments of S1 and polyester elastic filaments are synthesized into a filament bundle, and a plurality of adhesive nodes are formed on the filament bundle by an ultrasonic adhesive device to obtain the anti-ultraviolet and anti-falling elastic yarn.

[0021] In an embodiment of the present application, the ultrasonic adhesive device comprises an ultrasonic adhesive head, an adhesive base, and yarn holders arranged on both sides of the adhesive base, wherein the ultrasonic adhesive head has adhesive teeth, the adhesive base is provided with a groove, and the height of the yarn holder is not higher than the bottom of the groove; when the ultrasonic adhesive head and the adhesive base are pressed together, the groove accommodates the adhesive teeth.

[0022] Further, the yarn holder is used to hold the yarn, so that the filament bundle is gathered at the bottom of the inverted trapezoidal groove of the adhesive base.

[0023] Further, the groove is an inverted trapezoidal groove.

[0024] Preferably, the bottom width of the inverted trapezoidal groove is 0.5-1 mm, which can be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, or 1 mm.

[0025] Further, the number of the adhesive teeth is ≥2, and the specific number can be adjusted according to actual needs.

[0026] Further, the distance from the tooth tip of the adhesive tooth to the bottom of the inverted trapezoidal groove is 2-10 mm.

[0027] Preferably, the distance from the tooth tip of the bonding tooth to the bottom of the inverted trapezoidal groove is 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm; or any distance between any two numerical values.

[0028] In one embodiment of the present application, in S1, the amount of the titanate coupling agent is 1wt%-1.5wt% of the titanium dioxide.

[0029] In one embodiment of the present application, in S1, the adhesion is to mix the titanium dioxide particles and the titanate coupling agent directly and uniformly, and then adhere to the surface of several nylon elastic filaments.

[0030] In one embodiment of the present application, in S2, the titanium dioxide / nylon composite elastic filaments and the polyester elastic filaments in the filament bundle are respectively concentrated on one side to form a structure with different components on both sides. After ultrasonic bonding, the filament bundle is bonded by the bonding node, and the upper and lower layer structure of the titanium dioxide / nylon composite elastic filament (ultraviolet resistant and wear resistant layer) and the polyester elastic filament (skin-friendly layer) is fixed.

[0031] In one embodiment of the present application, in S2, during the preparation of the bonding node, the ultrasonic bonding time is 1s-2s, the vibration frequency is 20000Hz, the intermittent stop time of the filament bundle is 1s-2s, and the moving rate of the filament bundle is ≥2.4m / min.

[0032] The technical scheme of the present application has the following advantages compared with the prior art:

[0033] The preparation method of the present application applies ultrasonic bonding technology to elastic yarn, collects fiber filaments in a small size range through a special inverted trapezoidal bonding base, ensures that all fiber filaments are within the bonding range, and sets a specific two-end clamping structure to quickly and high-quality bond the fiber filaments. The bonding node formed by the ultrasonic bonding device can solve the problems of low cohesion of the elastic filament bundle and easy fiber shedding. After the fiber filaments are intermittently bonded by the bonding node, the cohesion of the filament bundle is effectively improved, the strength of the yarn is enhanced, the fiber shedding and hooking are reduced, and the weavability of the yarn is improved. In addition, the titanium dioxide / nylon composite filament with ultraviolet resistance and the comfortable polyester filament are fixed on the upper and lower sides by the bonding node with a certain spacing to form an elastic yarn with skin-friendliness, comfort, ultraviolet resistance, good strength, and anti-shedding. The elastic yarn can be applied to outdoor sports clothes, sun protection clothes, etc. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to make the content of the present application easier to be clearly understood, the present application will be further described in detail below according to specific embodiments of the present application and in conjunction with the drawings, in which:

[0035] Figure 1Structure diagram of the anti-ultraviolet and anti-falling elastic yarn of the present application;

[0036] Figure 2 Preparation process diagram of the anti-ultraviolet and anti-falling elastic yarn of the present application;

[0037] Explanation of reference numerals: 11-anti-ultraviolet wear-resistant layer, 12-skin-friendly layer, 13-adhesion node, 21-titanium dioxide / nylon composite elastic yarn, 22-polyester elastic yarn, 23-bunching device, 24-yarn holder, 25-ultrasonic bonding head, 26-bonding base, 27-anti-ultraviolet and anti-falling elastic yarn. DETAILED DESCRIPTION

[0038] The present application will be further described below in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present application and implement it. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. It should be understood that the specific embodiments are only used to explain the present application, but the embodiments are not limited to the present application.

[0039] In the present application, unless otherwise specified, the technical and scientific terms used in the present application have the same meaning as those commonly understood by the skilled in the art to which the present application belongs.

[0040] In the present application, unless otherwise specified, the term "and / or" used in the present application includes any and all combinations of one or more related listed items.

[0041] In the present application, unless otherwise specified, the experimental methods used in the embodiments of the present application are conventional methods, and the materials, reagents, etc. used are commercially available, unless otherwise specified.

[0042] In the present application, unless otherwise specified, the terms "comprising" and / or "including" used in the present application indicate the presence of the described features, whole, steps, operations, raw materials or components, but do not exclude the presence or addition of one or more other features, whole, steps, operations, raw materials, components or their combinations.

[0043] In the present application, unless otherwise specified, the titanium dioxide / nylon composite elastic yarn and the polyester elastic yarn in the tow are respectively concentrated on one side to form a structure with different components on both sides in the embodiments. After ultrasonic bonding, the tow is bonded by the adhesion node, and the upper and lower layer structure of the titanium dioxide / nylon composite elastic yarn (anti-ultraviolet wear-resistant layer) and the polyester elastic yarn (skin-friendly layer) is fixed.

[0044] In the present application, unless otherwise specified, the preparation of the anti-ultraviolet and anti-falling elastic yarn in the examples is carried out by an ultrasonic bonding device, which includes an ultrasonic bonding head, a bonding base and yarn holders arranged on both sides of the bonding base, the yarn holders are used to hold the yarns, and the filaments are gathered at the bottom of the inverted trapezoidal groove of the bonding base; wherein the ultrasonic bonding head has three bonding teeth, the bonding base is provided with an inverted trapezoidal groove, the bottom width of the inverted trapezoidal groove is 0.5 mm; the distance from the tooth tip of the bonding tooth to the bottom of the inverted trapezoidal groove is 5 mm; the height of the yarn holder is equal to the bottom of the groove; when the ultrasonic bonding head and the bonding base are pressed together, the groove accommodates the bonding teeth.

[0045] In the present application, unless otherwise specified, the titanate coupling agent used in the examples is purchased from Kangjing New Material Co., Ltd., and the model number is NDZ-201.

[0046] In the present application, unless otherwise specified, the anatase titanium dioxide used in the examples is purchased from Maikelin Reagent, and the particle size is 40 nm.

[0047] Example 1

[0048] Referring to Figure 1 As shown in the figure, the anti-ultraviolet and anti-falling elastic yarn of the present application is composed of an anti-ultraviolet and wear-resistant layer 11, a skin-friendly layer 12 and a bonding node 13; the anti-ultraviolet and wear-resistant layer 11 is composed of titanium dioxide particles and a plurality of nylon elastic filaments, the titanium dioxide particles are bonded to the surface of the nylon elastic filaments; the skin-friendly layer 12 is composed of a plurality of polyester elastic filaments, the surface is free of particle adhesion, and the comfort is better when in contact with the skin; the bonding node 13 is formed by bonding the anti-ultraviolet and wear-resistant layer 11 and the skin-friendly layer 12 at a plurality of nodes through ultrasonic bonding technology, which can prevent the yarn from falling apart and enhance the strength of the yarn.

[0049] Referring to Figure 2 As shown in the figure, the preparation method of the anti-ultraviolet and anti-falling elastic yarn of the present application uses an ultrasonic bonding device as the generating device, and specifically includes the following steps:

[0050] S1, uniformly mix the anatase titanium dioxide particles and the titanate coupling agent to obtain a mixture, the amount of the titanate coupling agent is 1.5 wt% of the titanium dioxide;

[0051] S2, bond the mixture of S1 to the surface of a plurality of 100D nylon 66 elastic filaments, and form a titanium dioxide / nylon composite elastic filament 21 after natural drying treatment;

[0052] S3, the titanium dioxide / nylon composite elastic filament 21 of S2 and the polyester elastic filament 22 of 70D are gathered into a bundle of yarns by the gatherer 23 according to the quantity ratio of 3:7, are held by the yarn holders 24 on both sides of the ultrasonic bonding device, are converged to the bottom of the inverted trapezoidal groove in the inverted trapezoidal groove of the bonding base 26, and form a plurality of bonding nodes with a spacing of 3 cm on the yarn bundle under the bonding action of the bonding teeth of the ultrasonic bonding head 25 to form the ultraviolet-resistant and anti-shedding elastic yarn 27; the ultrasonic bonding time is 1 s, the vibration frequency is 20000 Hz, the intermittent stop time of the yarn bundle is 1 s, and the moving speed of the yarn bundle is 4.8 m / min.

[0053] Example 2 is basically the same as Example 1, except that the bonding node spacing and the moving speed of the yarn bundle

[0054] Referring to Figure 2 The preparation method of the ultraviolet-resistant and anti-shedding elastic yarn of the present application is shown in the figure, which uses an ultrasonic bonding device as a generating device and specifically includes the following steps:

[0055] S1, uniformly mix anatase titanium dioxide particles and a titanate coupling agent to obtain a mixture, and the amount of the titanate coupling agent is 1.5 wt% of the titanium dioxide;

[0056] S2, bond the mixture of S1 to the surface of a plurality of 100D nylon 66 elastic filaments, and form titanium dioxide / nylon composite elastic filaments 21 after natural drying treatment;

[0057] S3, the titanium dioxide / nylon composite elastic filament 21 of S2 and the polyester elastic filament 22 of 70D are gathered into a bundle of yarns by the gatherer 23 according to the quantity ratio of 3:7, are held by the yarn holders 24 on both sides of the ultrasonic bonding device, are converged to the bottom of the inverted trapezoidal groove in the inverted trapezoidal groove of the bonding base 26, and form a plurality of bonding nodes with a spacing of 3 cm on the yarn bundle under the bonding action of the bonding teeth of the ultrasonic bonding head 25 to form the ultraviolet-resistant and anti-shedding elastic yarn 27; the ultrasonic bonding time is 1 s, the vibration frequency is 20000 Hz, the intermittent stop time of the yarn bundle is 1 s, and the moving speed of the yarn bundle is 4.8 m / min.

[0058] Example 3 is basically the same as Example 1, except that the quantity ratio of the titanium dioxide / nylon composite elastic filament 21 and the polyester elastic filament 22

[0059] Referring to Figure 2 The preparation method of the ultraviolet-resistant and anti-shedding elastic yarn of the present application is shown in the figure, which uses an ultrasonic bonding device as a generating device and specifically includes the following steps:

[0060] S1, uniformly mix anatase titanium dioxide particles and a titanate coupling agent to obtain a mixture, and the amount of the titanate coupling agent is 1.5 wt% of the titanium dioxide;

[0061] S2, the mixture of S1 is adhered to the surface of several 100D nylon 66 textured yarns to form titanium dioxide / nylon composite textured yarns 21 after natural drying treatment;

[0062] S3, the titanium dioxide / nylon composite textured yarns 21 of S2 and 70D polyester textured yarns 22 are combined into a bundle of yarns by a combiner 23 according to the quantity ratio of 4:6, held by yarn holders 24 on both sides of an ultrasonic bonding device, and gathered into the bottom of an inverted trapezoidal groove in the inverted trapezoidal groove of a bonding base 26, forming several bonding nodes on the yarn bundle with a spacing of 3 cm under the bonding action of the bonding teeth of an ultrasonic bonding head 25, forming ultraviolet-resistant and anti-shedding elastic yarns 27; the ultrasonic bonding time is 1 s, the vibration frequency is 20000 Hz, the intermittent stop time of the yarn bundle is 1 s, and the moving rate of the yarn bundle is 4.8 m / min.

[0063] Comparative Example 1 is basically the same as Example 1, except that ultrasonic bonding is not used

[0064] S1, the anatase titanium dioxide particles and the titanate coupling agent are mixed uniformly to obtain a mixture, and the amount of the titanate coupling agent is 1.5wt% of the titanium dioxide;

[0065] S2, the mixture of S1 is adhered to the surface of several 100D nylon 66 textured yarns to form titanium dioxide / nylon composite textured yarns;

[0066] S3, the titanium dioxide / nylon composite textured yarns of S2 and 70D polyester textured yarns are combined and twisted to obtain composite elastic yarns according to the quantity ratio of 3:7, and the twist number is 80 twists / m.

[0067] Comparative Example 2 is basically the same as Example 1, except that only titanium dioxide / nylon composite textured yarns are used

[0068] S1, the anatase titanium dioxide particles and the titanate coupling agent are mixed uniformly to obtain a mixture, and the amount of the titanate coupling agent is 1.5wt% of the titanium dioxide;

[0069] S2, the mixture of S1 is adhered to the surface of several 100D nylon 66 textured yarns to form titanium dioxide / nylon composite textured yarns;

[0070] The titanium dioxide / nylon composite elastic yarns of S3 and S2 are gathered into a bundle of yarns by the gatherer 23, held by the yarn holders on both sides of the ultrasonic bonding device, gathered into the bottom of the inverted trapezoidal groove in the bonding base, and formed into several bonding nodes with a spacing of 3 cm on the yarn bundle under the bonding action of the bonding teeth of the ultrasonic bonding head, forming the ultraviolet-resistant and anti-snapping elastic yarns; the ultrasonic bonding time is 1 s, the vibration frequency is 20000 Hz, the intermittent stop time of the yarn bundle is 1 s, and the moving rate of the yarn bundle is 4.8 m / min.

[0071] The comparative example 3 is basically the same as the example 1, except that only the polyester elastic yarn is used

[0072] The 70D polyester elastic yarn is gathered into a bundle of yarns by the gatherer 23, held by the yarn holders on both sides of the ultrasonic bonding device, gathered into the bottom of the inverted trapezoidal groove in the bonding base, and formed into several bonding nodes with a spacing of 3 cm on the yarn bundle under the bonding action of the bonding teeth of the ultrasonic bonding head, forming the ultraviolet-resistant and anti-snapping elastic yarns; the ultrasonic bonding time is 1 s, the vibration frequency is 20000 Hz, the intermittent stop time of the yarn bundle is 1 s, and the moving rate of the yarn bundle is 4.8 m / min.

[0073] The comparative example 4 is basically the same as the example 1, except that the titanium dioxide particles are not bonded

[0074] The 100D nylon 66 elastic yarn and the 70D polyester elastic yarn 22 are gathered into a bundle of yarns by the gatherer in a ratio of 3:7, held by the yarn holders on both sides of the ultrasonic bonding device, gathered into the bottom of the inverted trapezoidal groove in the bonding base, and formed into several bonding nodes with a spacing of 3 cm on the yarn bundle under the bonding action of the bonding teeth of the ultrasonic bonding head, forming the ultraviolet-resistant and anti-snapping elastic yarns; the ultrasonic bonding time is 1 s, the vibration frequency is 20000 Hz, the intermittent stop time of the yarn bundle is 1 s, and the moving rate of the yarn bundle is 4.8 m / min.

[0075] Test example

[0076] The elastic yarns prepared in the examples 1-3 and the comparative examples 1-4 are tested for yarn strength, yarn elongation, and ultraviolet resistance, and the relevant performance test methods are as follows:

[0077] (1) Yarn strength and yarn elongation: determined according to the GB / T 3916-2013 “Determination of Breaking Force and Elongation at Break of Single Yarn in Textile Package” standard;

[0078] (2) Ultraviolet resistance: determined according to the GB / T 18830-2009 “Evaluation of Anti-Ultraviolet Performance of Textiles” standard (the yarns are woven into fabrics for testing).

[0079] The relevant performance parameters of the final elastic yarn are shown in Table 1:

[0080] Table 1

[0081] Yarn strength (MPa) Yarn elongation (%) Ultraviolet resistance (UPF) Example 1 461 210 47 Example 2 448 198 45 Example 3 470 208 50+ Comparative Example 1 402 230 50+ Comparative Example 2 475 206 50++ Comparative Example 3 435 221 20 Comparative Example 4 443 217 21

[0082] From the results in Table 1, it can be seen that the elastic yarn of Example 1 has high yarn strength and good UV resistance. From the yarn strength of Examples 2 and Comparative Example 1, it can be seen that as the number of bonding points decreases, the yarn strength decreases slightly, which is mainly due to the increase in bonding spacing and the decrease in the number of bonding points. The elongation of the elastic yarn also decreases slightly, and the overall performance is not significantly affected. In addition, from the strength changes of Examples 1, 3 and Comparative Example 2, it can be seen that the attachment of titanium dioxide particles improves the frictional cohesion between fibers, thereby slightly increasing the yarn strength. From Examples 1, 3 and Comparative Examples 2, 3, it can be seen that the sunscreen index of the fabric prepared by the composite elastic yarn increases with the increase of the ratio of titanium dioxide / nylon 66 composite elastic yarn, so that the fabric has good UV resistance.

[0083] Obviously, the above examples are only examples for the purpose of clarity, and are not limiting of the embodiments. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. It is not necessary and impossible to exhaust all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

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