A fully dull polyester-spandex covered yarn

Abstract

The present invention provides a fully matte polyester spandex covered yarn, which comprises: a core yarn and a covering yarn. The core yarn is a spandex yarn, and the covering yarn comprises a number of polyester yarns arranged in parallel; the spandex yarn is a fully matte spandex, and the fully matte spandex comprises a core part and a skin part, the core part is spandex, and the skin part is functional low-melting-point spandex; the polyester yarn is a fully matte polyester, and the polyester yarn is spirally wound on the outer surface of the core yarn. Compared with the prior art, the polyester spandex covered yarn of the present invention not only has better strength and elastic recovery rate, but also the fabric woven from the covering yarn is not easy to leave creases, and has good hand feel and wearing comfort. In addition, the use of fully matte polyester and fully matte spandex makes it have the advantages of soft luster, deep dyeing and good drape of the fabric.

Description

Technical Field

[0001] The present invention relates to the technical field of covered yarn preparation, and particularly relates to a fully dull polyester spandex covered yarn. Background Art

[0002] Existing elastic fabrics are usually woven from spandex covered yarns. Since the spandex covered yarns used generally have spandex filaments as the core, and long filaments or staple fiber yarns are used to wrap the stretched spandex filaments in a spiral manner to form elastic yarns. Spandex covered yarns are widely used in clothing, especially in the field of elastic clothing, due to their good elastic recovery. Fabrics woven with spandex covered yarns as raw materials, such as two-way stretch and four-way stretch fabrics, have a soft handfeel and good elasticity, and are highly favored in the clothing field. Spandex covered yarns can be divided into single-covered yarns and double-covered yarns according to the number of covering layers, among which nylon-spandex and polyester-spandex are mostly single-covered.

[0003] With the continuous improvement of people's requirements for clothing, traditional single spandex covered yarns can no longer meet the existing market demands, and people's requirements for fiber yarns are also constantly increasing. Among them, fully dull fibers are one of the current consumption hotspots. Fully dull fibers are obtained by melt spinning, drawing, and winding of fully dull chips. Fully dull chips not only reduce the reflection and flashing phenomena of the fibers, but also endow the subsequent fibers with advantages such as soft luster, good deep dyeability, high fabric drapability, and strong shielding performance, which can meet the requirements for making high-grade clothing.

[0004] Therefore, we have invented a fully dull polyester spandex covered yarn. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a fully dull polyester spandex covered yarn to meet the further usage requirements of spandex covered yarns.

[0006] The technical solution adopted by the present invention to solve its technical problems is:

[0007] The present invention discloses a fully dull polyester spandex covered yarn, including a core filament and a covering filament.

[0008] The core filament is a spandex filament, and the covering filament includes a plurality of polyester filaments arranged side by side; the spandex filament is a fully dull spandex, and the fully dull spandex includes a core part and a skin part, the core part is spandex, and the skin part is a functional low-melting-point spandex; the polyester filaments are fully dull polyester, and the polyester filaments are spirally wound on the outer surface of the core filament.

[0009] On the basis of the above solution and as a preferred solution of the above solution, the melting range of the functional low-melting-point spandex is 90-125 °C, and the functional low-melting-point spandex is made by mixing raw material components including the following mass parts:

[0010]

[0011] Among them, the nano metal oxide is nano zinc oxide / graphene powder, and the nano zinc oxide / graphene powder is prepared by the following method:

[0012] S1: An aqueous alcohol solution of sodium hydroxide with a concentration of 5-30 wt% and a dimethyl sulfoxide solution of zinc acetate hydrate with a concentration of 10-70 wt% are respectively placed into dropping funnels, and then simultaneously dropped into a graphene alcohol solution, stirred for 60-100 min to be fully dispersed, and then left standing for 5-10 h to be layered. The supernatant is poured off to obtain a precipitate;

[0013] S2: The precipitate is washed with alcohol until it is dried at 50-65 °C for 8-10 h to obtain nano zinc oxide / graphene powder.

[0014] On the basis of the above solution and as a preferred solution of the above solution, the preparation of the functional low melting point spandex includes the following steps:

[0015] (1) Pre-polymerization: Mix and stir isocyanate and polyether diol, heat up for reaction, and cool to obtain a pre-polymerization product;

[0016] (2) Polymerization: After dissolving the pre-polymerization product prepared in step (1) with an aprotic polar solvent, add a chain extender, a delustering agent, an antibacterial agent, a nano metal oxide, nano cellulose, etc. and stir evenly, then transfer it to a polymerization reaction kettle, and introduce a refrigerant at a certain temperature to react to generate a polyurethane fiber spinning dope with a molecular weight;

[0017] (3) Spinning: The polyurethane fiber spinning dope prepared in step (2) is made into functional low melting point spandex fibers.

[0018] On the basis of the above solution and as a preferred solution of the above solution, the spandex in the core and the spandex in the skin are concentric circles, and the area ratio of the two is 5:2.

[0019] On the basis of the above solution and as a preferred solution of the above solution, a method for preparing a fully delustered polyester-spandex covered yarn includes the following steps:

[0020] First, the polyester filament is led out from the filament rack, and then the following process is completed on the false twist texturing machine table:

[0021] 1) Feed the polyester filament led out from the filament rack into the first roller of the false twist texturing machine table. After being wound and combined by the first roller, it is heated by a texturing hot box and cooled by a cooling plate to obtain a polyester filament;

[0022] 2) Feed the polyester filaments obtained in step 1) and spandex filaments into the two-roll machine together. After being combined by the two-roll machine, they enter the air-jet nozzle, and are bonded by jetting in the air-jet nozzle, and then are sent to the winding device through the three-roll machine for winding and forming processing, thus obtaining the full dull polyester-spandex covered yarn of the present invention;

[0023] On the basis of the above solution and as the preferred solution of the above solution, the specification of the polyester filament is 30 - 250D, the specification of the spandex filament is 20 - 85D, the heating temperature of the texturing hot box is 150 - 200 °C, the speed of the first roll is 550 - 850 m / min, the speed of the second roll is 550 - 850 m / min, the speed of the third roll is 550 - 850 m / min, the rotational speed of the false twister is 2500 - 8500 r / min, and the pressure at the air-jet nozzle is 2.5 - 4.0 kg / cm 2 .

[0024] On the basis of the above solution and as the preferred solution of the above solution, the technical indicators satisfied by the full dull polyester-spandex covered yarn are: breaking strength ≥ 3.40 cN / dtex; coefficient of variation of breaking strength ≤ 10.00%; breaking elongation at break 25.00% - 37.00%; coefficient of variation of breaking elongation at break ≤ 12.00%; dyeing evenness ≥ 4 levels.

[0025] The beneficial effects of the present invention are:

[0026] Compared with the prior art, the polyester-spandex covered yarn of the present invention not only has good strength and elastic recovery rate, the fabric woven from this covered yarn is not easy to leave creases, but also has good hand feeling and wearing comfort. Coupled with the use of full dull polyester and full dull spandex, it has the advantages of soft luster, deep dyeability and good fabric drapability. Brief Description of the Drawings

[0027] Figure 1 It is a schematic structural diagram of the covered yarn of the present invention;

[0028] Figure 2 It is a schematic structural diagram of the spandex filament of the present invention;

[0029] Figure 3 It is a schematic microstructural diagram of the nano-zinc oxide / graphene powder, where the spherical shape is the nano-zinc oxide particles and the wrinkled layer is graphene.

[0030] In the figure, 1 - core filament; 2 - covered filament; 11 - core part; 12 - skin part. Detailed Embodiments

[0031] The present invention is further explained below in conjunction with specific embodiments, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Embodiment 1

[0033] like Figures 1-3 As shown, a fully matte polyester spandex covered yarn includes a core yarn and a covering yarn, wherein the core yarn is a spandex yarn, and the covering yarn includes a number of polyester yarns arranged in parallel; the spandex yarn is fully matte spandex, and the fully matte spandex includes a core part and a sheath part, wherein the core part is spandex, and the sheath part is functional low-melting-point spandex; the polyester yarn is fully matte polyester, and the polyester yarn is spirally wound on the outer surface of the core yarn. In this embodiment, the covering yarn includes two polyester yarns arranged in parallel.

[0034] Furthermore, the melting range of the functional low-melting spandex is 90-125° C., and the functional low-melting spandex is prepared by mixing the following raw material components in parts by weight:

[0035]

[0036] Wherein, the nano metal oxide is nano zinc oxide / graphene powder, and the nano zinc oxide / graphene powder is prepared according to the following method:

[0037] S1: Place a 5-30wt% sodium hydroxide alcohol aqueous solution and a 10-70wt% zinc acetate hydrate dimethyl sulfoxide solution in a dropping funnel respectively, and then simultaneously add them to the graphene alcohol solution, stir for 60-100 minutes, fully disperse, and then stand for 5-10 hours, separate the layers, and pour off the upper clear liquid to obtain a precipitate;

[0038] S2: washing the precipitate with alcohol, and drying it at 50-65° C. for 8-10 h to obtain nano zinc oxide / graphene powder.

[0039] Among them, the alcohol-water mixture of the aqueous sodium hydroxide solution is prepared from ethanol and water with a volume ratio of 1:1. The use of the ethanol-water mixed solution takes advantage of the different intermolecular forces between water and ethanol molecules. At the ethanol-water interface, some water molecules form hydrogen bonds with ethanol, thus breaking the interface. As a result, ethanol is continuously attracted by water molecules and enters the water from the interface to continue to form hydrogen bonds with the internal water. Graphene has many hydrophilic groups and good water solubility. The addition of graphene causes a flocculent movement phenomenon. Furthermore, during the process of water molecules forming hydrogen bonds with ethanol, it can initially prevent the aggregation of graphene, and thus is beneficial to the attachment of zinc oxide nanoparticles on graphene, as Figure 3 shown.

[0040] By adopting the above technical solution, the use of graphene also has the same effect as that of siloxane coupling agents. Since nano-cellulose and graphene are used in the above formula, the surface of nano-cellulose contains a large number of hydroxyl groups, which can bond with each other to form hydrogen bonds and generate a three-dimensional network structure, enabling the antibacterial agent, the delustering agent and the metal oxide to be fully loaded on the surface of the spandex core. In this way, while fully loading the antibacterial agent and the delustering agent on the surface of the spandex, a dense functional layer with antibacterial properties can be formed on the surface of the spandex core, and it has more excellent washability. For graphene, on the one hand, sodium hydroxide reacts with zinc acetate hydrate at room temperature, and the crystallization growth of zinc oxide nanoparticles occurs at the low-potential energy binding sites of the wrinkled morphology of graphene. Zinc oxide also helps to prevent the aggregation of graphene. On the other hand, using the active functional groups on the surface of graphene, an etherification reaction can occur with the hydroxyl groups on the surface of nano-cellulose to form a chemical connection, promoting the adhesion of the functional layer to the spandex core filaments to be denser and stronger, and improving the washability of the spandex fabric.

[0041] Furthermore, the preparation of the functional low-melting-point spandex includes the following steps:

[0042] (1) Pre-polymerization: Mix and stir isocyanate and polyether diol, raise the temperature for reaction, and cool to obtain a pre-polymerization product;

[0043] (2) Polymerization: After dissolving the pre-polymerization product prepared in step (1) with an aprotic polar solvent, add a chain extender, a delustering agent, an antibacterial agent, nano-metal oxide, nano-cellulose, etc., stir evenly, and then transfer it to a polymerization reaction kettle, and introduce a refrigerant at a certain temperature to react to generate a spandex spinning dope with a molecular weight;

[0044] (3) Spinning: Make the spandex spinning dope prepared in step (2) into functional low-melting-point spandex fibers.

[0045] Furthermore, functional low-melting-point spandex and spandex are used as raw materials to prepare spandex core filaments. Among them, the spandex in the core and the spandex in the skin are concentric circles, and the area ratio of the two is 5:2. Since adding a delustering agent has a certain impact on the repeated tensile recovery performance of spandex filaments at a constant elongation, in order to reduce the impact of the added delustering agent on the performance of spandex, polyether-type polyurethane equivalent to the amount of the delustering agent is added to the functional low-melting-point spandex fibers in the skin. That is, the functional low-melting-point spandex fibers include a delustering agent and an equal content of polyether-type polyurethane, and the balance is polyester-type polyurethane.

[0046] Furthermore, a preparation method of a fully delustered polyester-spandex covered yarn includes the following steps:

[0047] First, the polyester yarn is led out from the yarn stand, and then the following process is completed on the false twist texturing machine table:

[0048] 1) The polyester yarn led out from the yarn stand is fed into the first roller of the false twist texturing machine table. After being wound and combined by the first roller, it is heated by a heat setting box and cooled by a cooling plate to obtain polyester yarn;

[0049] 2) The polyester yarn obtained in step 1) and the spandex yarn are fed into the second roller together. After being combined by the second roller, they enter the air jet nozzle. Through air jet bonding by the air jet nozzle, and then sent to the winding device through the third roller for winding and forming processing, thus obtaining the present fully delustered polyester-spandex covered yarn;

[0050] Among them, the specification of the polyester yarn is 30 - 250D, the specification of the spandex yarn is 20 - 85D, the heating temperature of the heat setting box is 150 - 200 °C, the speed of the first roller is 550 - 850 m / min, the speed of the second roller is 550 - 850 m / min, the speed of the third roller is 550 - 850 m / min, the rotational speed of the false twister is 2500 - 8500 r / min, and the pressure at the air jet nozzle is 2.5 - 4.0 kg / cm 2 。

[0051] Example Two

[0052] Different from the above Example One, the melting range of the functional low-melting-point spandex is 90 - 125 °C, and the functional low-melting-point spandex is made by mixing raw material components including the following mass parts:

[0053]

[0054] Comparative Example

[0055] Different from the above Example One, the core filament is ordinary spandex yarn.

[0056] Performance Test

[0057] 1. Elasticity Test

[0058] The repeated tensile performance of the covered filaments in the above embodiments was tested. The test was carried out in accordance with the standard FZ / T 5007-1994 "Test Method for Elasticity of Spandex Yarns". The spandex yarns were tested under different constant elongation rates (300% and 500%) with the number of tensile times being 20 and 30 times respectively.

[0059] 2. Antibacterial property test

[0060] The antibacterial property of textiles was tested according to AATCC 147—2011 "Assessment of Antibacterial Activity of Textiles: Parallel Stripe Method".

[0061] The test result data of Examples 1 to 2 and the comparative example were sorted out as shown in the following table:

[0062]

[0063] It can be seen from the above test results that the spandex yarns added with polyether-type polyurethane (i.e., functional low-melting-point spandex) have better repeated tensile recovery performance at a constant elongation. And due to the addition of the antibacterial agent, the covered filaments have a certain antibacterial effect. Further, the technical indicators satisfied by the full dull polyester spandex covered filaments are: breaking strength ≥ 3.40 cN / dtex; coefficient of variation of breaking strength ≤ 10.00%; breaking elongation 25.00% - 37.00%; coefficient of variation of breaking elongation ≤ 12.00%; dyeing evenness ≥ 4 grades.

[0064] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present invention based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the protection scope determined by the claims.

Claims

1. A fully dull polyester spandex covered yarn, characterized in that, include: A core yarn and a covering yarn, wherein the core yarn is a spandex yarn, and the covering yarn comprises a plurality of polyester yarns arranged in parallel; The spandex yarn is full-dull spandex, and the full-dull spandex includes a core and a sheath, the core is spandex, and the sheath is functional low-melting-point spandex; the polyester yarn is full-dull polyester, and the polyester yarn is spirally wound on the outer surface of the core yarn; The functional low-melting spandex has a melting range of 90-125° C., and the functional low-melting spandex is prepared by mixing the following raw material components in parts by weight: Isocyanate and polyether diol 100 parts; Matting agent 2-50 parts; 1-3 parts of antibacterial agent; 9-17 parts of nano metal oxide; Nanocellulose 6-13 parts; Chain extender 1-5 parts; 70-90 parts of aprotic polar solvent; Wherein, the nano metal oxide is nano zinc oxide / graphene powder, and the nano zinc oxide / graphene powder is prepared according to the following method: S1: Place a 5-30wt% sodium hydroxide alcohol aqueous solution and a 10-70wt% zinc acetate hydrate dimethyl sulfoxide solution in a dropping funnel respectively, and then simultaneously add them to the graphene alcohol solution, stir for 60-100 minutes, fully disperse, and then stand for 5-10 hours, separate the layers, and pour off the upper clear liquid to obtain a precipitate; S2: washing the precipitate with alcohol, and drying it at 50-65° C. for 8-10 h to obtain nano zinc oxide / graphene powder; The preparation of the functional low-melting-point spandex comprises the following steps: (1) Prepolymerization: Mix isocyanate and polyether diol, stir, heat to react, and cool to obtain a prepolymer product; (2) Polymerization: The prepolymer product obtained in step (1) is dissolved in a non-protonic polar solvent, and then a chain extender, a scavenger, and a The brightener, antibacterial agent, nano metal oxide and nano cellulose are stirred evenly, and then transferred to a polymerization reactor, and a refrigerant of a certain temperature is introduced to react to generate a molecular weight spandex spinning solution; (3) Spinning: The spandex spinning solution obtained in step (2) is made into functional low-melting-point spandex fibers.

2. The full dull polyester spandex covered yarn according to claim 1, characterized in that, The spandex of the core and the spandex of the skin are concentric circles, and the area ratio between the two is 5:

2.

3. A preparation method of a fully dull polyester polyurethane covered yarn as described in claim 1, characterized in that, The following steps are involved: First, the polyester yarn is drawn out from the yarn rack, and then the following processes are completed on the false twist texturing machine: 1) feeding the polyester yarn drawn out from the yarn rack into a roller of a false twist texturing machine, winding and merging by a roller, heating through a texturing hot box, and cooling through a cooling plate to obtain polyester yarn; 2) The polyester yarn and spandex yarn obtained in step 1) are fed into the second roller together, and after being combined by the second roller, enter the network nozzle, and are jet-bonded by the network nozzle, and then sent to the winding device for winding and forming processing after passing through the third roller, so as to obtain the full-dull polyester spandex coated yarn.

4. The preparation method of a fully dull polyester-spandex covered yarn according to claim 3, characterized in that, The specification of the polyester filament is 30 - 250D, the specification of the spandex filament is 20 - 85D, the heating temperature of the texturing hot box is 150 - 200 °C, the speed of the first roller is 550 - 850 m / min, the speed of the second roller is 550 - 850 m / min, the speed of the third roller is 550 - 850 m / min, the rotational speed of the false twister is 2500 - 8500 r / min, and the pressure at the air jet texturing nozzle is 2.5 - 4.0 kg / cm2.

5. A fully dull polyester spandex covered yarn according to claim 1, characterized in that The technical indicators met by the full dull polyester-spandex covered yarn are as follows: breaking strength ≥ 3.40 cN / dtex; coefficient of variation of breaking strength ≤ 10.00%; breaking elongation at break 25.00% - 37.00%; coefficient of variation of breaking elongation at break ≤ 12.00%; dyeing evenness ≥ grade 4.

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