Cotton-like quick-dry yarn and preparation method thereof

Abstract

The invention relates to the technical field of textile fibers, in particular to a cotton-like quick-dry yarn and a preparation method thereof. The cotton-like quick-dry yarn is of a core-sheath structure, the core part of the core-sheath structure is rigid yarn, the sheath part of the core-sheath structure is filament POY (pre-oriented yarn) of a honeycomb structure, and the weight ratio of the core part to the sheath part is (3-7): (7-3). The filament POY of the honeycomb structure serves as the sheath part, the rigid yarn serves as the core part, and the core-sheath structure with the good cotton-like quick-drying effect and the good air permeability is formed.

Description

Technical Field

[0001] The invention relates to the technical field of textile fibers, and in particular to a cotton-like quick-drying yarn and a preparation method thereof. Background Art

[0002] Polyester fiber has become the most common textile material today due to its low price and excellent processability. Conventional PET (polyethylene terephthalate) polyester fiber has the problems of low moisture regain, insufficient softness of the fabric, and poor comfort. With the development of the times, people have higher and higher requirements for clothing, requiring both good comfort and quick-drying properties. Cotton fiber has the characteristics of good hygroscopicity and softness, but it has deficiencies in shape retention, sweat conduction and moisture removal, and is in short supply and high in price. Therefore, the industry has begun to develop imitation cotton yarn with quick-drying function. At present, there are many varieties of imitation cotton quick-drying yarns on the market. For example, application number 202311835463.5 discloses a composite functional yarn, which is composed of cross-shaped microfibers and elastic polyester fibers with a circular cross-section and has excellent moisture absorption and quick-drying functions. However, the composite functional yarn needs to be combined with a specific weaving structure to achieve the imitation cotton effect, and the application scenarios are limited. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a cotton-like quick-drying yarn and a preparation method thereof.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a cotton-like quick-drying yarn, the cotton-like quick-drying yarn is a core-sheath structure, the core of the core-sheath structure is a rigid yarn, and the sheath is a honeycomb structure of filament POY (pre-oriented yarn), and the weight ratio of the core and the sheath is 3~7:7~3.

[0005] Another technical solution adopted by the present invention is: the preparation method of the above-mentioned cotton-like quick-drying yarn, the honeycomb structure filament POY passes through a roller, a heat box, a false twister, a tension sensor, a second roller, a second heat box, a third roller and an oil tanker in sequence, and is finally wound into shape; the honeycomb structure filament POY and the rigid yarn are intertwined before passing through a roller, or are intertwined between the second roller and the second heat box.

[0006] The beneficial effect of the present invention is that the present invention uses the filament POY with a honeycomb structure as the sheath part and the rigid yarn as the core part, thereby forming a core-sheath structure with good cotton-like quick-drying effect and good air permeability. DETAILED DESCRIPTION

[0007] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes.

[0008] A cotton-like quick-drying yarn, the cotton-like quick-drying yarn is a core-sheath structure, the core of the core-sheath structure is a rigid yarn, the sheath is a filament POY with a honeycomb structure, and the weight ratio of the core to the sheath is 3~7:7~3. The filament POY with the honeycomb structure is a lightweight fiber with a honeycomb structure and moisture absorption and quick drying as described in the Chinese invention patent with publication number CN118272951A.

[0009] From the above description, it can be seen that the beneficial effect of the present invention is that the current imitation cotton yarn, especially the imitation cotton yarn made of polyester filament, still has a large gap with cotton yarn in terms of hand feel, moisture regain, etc. The imitation cotton quick-drying yarn of the present invention is a core-sheath structure, wherein the core is a rigid yarn and the sheath is a filament POY with a honeycomb structure. The core-sheath structure has excellent imitation cotton effect and air permeability. Its specific honeycomb structure has low crystallinity in the POY state, is easy to form holes, and has hydrophilic quick-drying properties. The present invention balances the imitation cotton effect and hydrophilic quick-drying properties of the yarn by adjusting the weight ratio of the core and the sheath.

[0010] Furthermore, the rigid yarn is filament FDY (fully drawn yarn) or filament DTY (drawn textured yarn), and the filament FDY and the filament DTY are inelastic filaments or parallel composite elastic filaments.

[0011] Furthermore, the parallel composite elastic filament is any one of T8 fiber, T400 fiber and SPH fiber.

[0012] Furthermore, the material of the rigid yarn is at least one of PET (polyethylene terephthalate), PA (polyamide) and polyester.

[0013] Furthermore, the polyester is at least one of polyethylene terephthalate, polybutylene terephthalate and polytrimethylene terephthalate.

[0014] Furthermore, when the rigid yarn is filament FDY, filament DTY or non-elastic filament, the material is PET, PA or polyester.

[0015] Furthermore, when the rigid yarn is a parallel composite elastic filament, the material is polyester.

[0016] Furthermore, the rigid yarn and the filament POY with the honeycomb structure have a circular cross section or a special cross section.

[0017] From the above description, it can be seen that most of the cotton-like quick-drying yarns on the market currently use special-shaped cross-sections to improve the siphon effect of the yarn to achieve quick-drying effect. In the present invention, due to the special honeycomb structure, the quick-drying effect can be achieved by only using a conventional circular cross-section.

[0018] Furthermore, the special-shaped cross section is any existing special-shaped cross section such as triangle, cross, flat, double cross, hollow, etc.

[0019] Furthermore, the filaments FDY and DTY are of a honeycomb structure.

[0020] From the above description, it can be seen that the honeycomb structure of the filament FDY and the filament DTY can further improve the moisture absorption and quick-drying performance of the cotton-like quick-drying yarn.

[0021] Another technical solution adopted by the present invention is: in the preparation method of the above-mentioned cotton-like quick-drying yarn, the filament POY with a honeycomb structure passes through a roller, a heat box, a false twister, a tension sensor, a second roller, a second heat box, a third roller and an oil tanker in sequence, and is finally wound into shape; the filament POY with a honeycomb structure is intertwined with the rigid yarn before passing through a roller, or is intertwined between the second roller and the second heat box.

[0022] It can be seen from the above description that the preparation method of the present invention has a simple process and is easy to implement.

[0023] Furthermore, the temperature of a heat box is 90~170℃.

[0024] Furthermore, the speed of the two rollers is 300~500m / min.

[0025] Furthermore, the temperature of the second heating box is 90~170℃.

[0026] From the above description, it can be seen that the temperature of the conventional first and second heat boxes is 140~230℃. Since the honeycomb structure filament POY has the characteristics of micro-porosity and low melting point, in order to avoid its deformation and wire breakage at high temperature, the temperature of the first and second heat boxes is lowered.

[0027] Furthermore, the honeycomb structured filament POY and the rigid yarn are intertwined through a network nozzle, and the air pressure of the network nozzle is 0.25-0.35 MPa.

[0028] Furthermore, the oil content of the cotton-like quick-drying yarn is 3-6%.

[0029] From the above description, it can be seen that the speed of the conventional two rollers is 400-650 m / min, the air pressure of the network nozzle is 0.3-0.35 MPa, and the oil content of the imitation cotton quick-drying yarn is 1.5-3%. Since the honeycomb structure filament POY has low strength, low melting point, and high static electricity, in order to reduce the phenomenon of broken wire and fuzzing of the honeycomb structure filament POY, the present invention reduces the speed and air pressure in the preparation process, and at the same time increases the oil content of the yarn.

[0030] Furthermore, when the honeycomb filament POY and the rigid yarn are intertwined between the second roller and the second heat box, the honeycomb filament POY passes through the first roller, the first heat box, the false twister and the tension sensor of the texturing machine in sequence, and the rigid yarn passes through the zero roller and the second roller in sequence; then the honeycomb filament POY and the rigid yarn are intertwined through the network nozzle, and then pass through the second heat box, the third roller and the oil tanker in sequence, and finally are wound and formed to obtain the cotton-like quick-drying yarn.

[0031] Further, the rigid yarn passes through a zero roller, a heat box, a false twister and a second roller in sequence.

[0032] Further, the rigid yarn passes through a zero roller, a heat box and two rollers in sequence.

[0033] Further, the rigid yarn passes through the zero roller, the false twister and the second roller in sequence.

[0034] Furthermore, when the honeycomb-structured filament POY and the rigid yarn are intertwined before passing through the first roller, the honeycomb-structured filament POY and the rigid yarn pass through the zero roller of the texturing machine together, are intertwined through the network nozzle, and then pass through the first roller, the first heat box, the false twister, the tension sensor, the second roller, the second heat box, the third roller and the oil tanker in sequence, and finally are wound into a cotton-like quick-drying yarn.

[0035] Embodiment 1 of the present invention is: a cotton-like quick-drying yarn, the cotton-like quick-drying yarn is a core-sheath structure, the core of the core-sheath structure is 83dtex / 48F, 30% elongation at break of circular cross-section honeycomb structure filament FDY (PET material), the sheath is 128dtex / 144F, 130% elongation at break of circular cross-section honeycomb structure filament POY (polypropylene terephthalate material), the weight ratio of the core to the sheath is 3:7. The honeycomb structure filament POY is a lightweight fiber with a honeycomb structure, moisture absorption and quick drying, as described in the Chinese invention patent publication number CN118272951A.

[0036] The second embodiment of the present invention is: a cotton-like quick-drying yarn, which is a core-sheath structure, wherein the core of the core-sheath structure is a triangular cross-section filament DTY (polyester material) with a core of 61dtex / 48F and a breaking elongation of 30%, and the sheath is a circular cross-section honeycomb structure filament POY (polyethylene terephthalate material) with a breaking elongation of 128dtex / 144F and a breaking elongation of 130%, and the weight ratio of the core to the sheath is 7:3. The honeycomb structure filament POY is a lightweight fiber with a honeycomb structure, moisture absorption and quick drying, as described in the Chinese invention patent publication number CN118272951A.

[0037] The third embodiment of the present invention is: a cotton-like quick-drying yarn, which is a core-sheath structure, wherein the core of the core-sheath structure is a cross-section T400 fiber with a core of 79dtex / 46F and a breaking elongation of 35%, and the sheath is a filament POY (polybutylene terephthalate material) with a circular cross-section honeycomb structure of 128dtex / 144F and a breaking elongation of 130%, and the weight ratio of the core to the sheath is 1: 1. The filament POY with a honeycomb structure is a lightweight fiber with a honeycomb structure, moisture absorption and quick drying, as described in the Chinese invention patent with publication number CN118272951A.

[0038] The fourth embodiment of the present invention is: a cotton-like quick-drying yarn, which is a core-sheath structure, wherein the core of the core-sheath structure is a circular cross-section inelastic filament (PA material) of 79dtex / 46F and a breaking elongation of 35%, and the sheath is a circular cross-section honeycomb structure filament POY (polybutylene terephthalate material) of 128dtex / 144F and a breaking elongation of 130%, and the weight ratio of the core to the sheath is 3:2. The honeycomb structure filament POY is a lightweight fiber with a honeycomb structure, moisture absorption and quick drying, as described in the Chinese invention patent publication number CN118272951A.

[0039] Embodiment 5 of the present invention is: a method for preparing a cotton-like quick-drying yarn, the preparation method is as follows: the honeycomb-structured filament POY and the rigid yarn are fed together through the zero roller of the texturing machine at a vehicle speed, and then intertwined through a network nozzle, the air pressure of the network nozzle is 0.35MPa; then passed through a roller, entered a hot box with a set temperature of 140°C for heating and 1.05 times stretching, and after being cooled by a cooling plate, entered a false twister for false twisting deformation, and then entered a tension sensor, a second roller with a vehicle speed of 500m / min, a second hot box with a set temperature of 90~170°C, a third roller and an oil tanker in sequence, and finally wound to obtain a cotton-like quick-drying yarn with an oil content of 3%.

[0040] The weight ratio of the honeycomb structure filament POY to the rigid yarn is 60:40; the honeycomb structure filament POY is a circular cross-section honeycomb structure filament POY (PET material) with a breaking elongation of 130% and 128dtex / 144F, which is equivalent to the honeycomb structure, moisture-absorbing and quick-drying lightweight fiber recorded in the Chinese invention patent with publication number CN118272951A; the rigid yarn is a circular cross-section honeycomb structure filament FDY (PET material) with a breaking elongation of 30% and 83dtex / 48F.

[0041] Embodiment 6 of the present invention is: a method for preparing a cotton-like quick-drying yarn, the preparation method being as follows: a honeycomb-structured filament POY and a rigid yarn are fed together through the zero roller of a texturing machine at a vehicle speed, and then intertwined through a network nozzle, the air pressure of the network nozzle being 0.30 MPa; then passed through a roller, entered a hot box with a set temperature of 140°C for heating and 1.05 times stretching, cooled through a cooling plate, and entered a false twister for false twisting deformation, and then entered a tension sensor, a second roller with a vehicle speed of 500 m / min, a second hot box with a set temperature of 150°C, a third roller and an oil tanker in sequence, and finally wound to obtain a cotton-like quick-drying yarn with an oil content of 3%.

[0042] The weight ratio of the honeycomb structure filament POY to the rigid yarn is 70:30; the honeycomb structure filament POY is a circular cross-section honeycomb structure filament POY (PET material) with a breaking elongation of 130% and 128dtex / 144F, which is equivalent to the honeycomb structure, moisture-absorbing and quick-drying lightweight fiber recorded in the Chinese invention patent with publication number CN118272951A; the rigid yarn is a circular cross-section ordinary filament FDY (polyester material) with a breaking elongation of 30% and 61dtex / 48F.

[0043] Embodiment 7 of the present invention is: a method for preparing a cotton-like quick-drying yarn, the preparation method is as follows: the honeycomb-structured filament POY and the rigid yarn are fed together through the zero roller of the texturing machine at a vehicle speed, and then intertwined through a network nozzle, the air pressure of the network nozzle is 0.25~0.35MPa; then passed through a roller, entered a hot box with a set temperature of 90~170°C for heating and 1.05 times stretching, and after being cooled by a cooling plate, entered a false twister for false twisting deformation, and then entered a tension sensor, a second roller with a vehicle speed of 300~500m / min, a second hot box with a set temperature of 90~170°C, a third roller and an oil tanker in sequence, and finally wound to obtain a cotton-like quick-drying yarn with an oil content of 4%.

[0044] The weight ratio of the honeycomb structure filament POY to the rigid yarn is 60:40; the honeycomb structure filament POY is a circular cross-section honeycomb structure filament POY (PET material) with a breaking elongation of 130% and 128dtex / 144F, which is equivalent to the honeycomb structure, moisture-absorbing and quick-drying lightweight fiber recorded in the Chinese invention patent with publication number CN118272951A; the rigid yarn is a circular cross-section inelastic filament (PET material) with a breaking elongation of 35% and 79dtex / 46F.

[0045] Embodiment 8 of the present invention is: a method for preparing a cotton-like quick-drying yarn, the preparation method being as follows: the honeycomb-structured filament POY is fed through a roller of a texturing machine, enters a hot box with a set temperature of 140°C for heating and 1.75 times stretching, is cooled through a cooling plate, enters a false twister for false twisting deformation, and then enters a tension sensor; the rigid yarn is fed through the zero roller of the texturing machine and enters the second roller with a speed of 500 m / min; then the honeycomb-structured filament POY and the rigid yarn are intertwined through a network nozzle, and the air pressure of the network nozzle is 0.35 MPa; after intertwining, they enter the second hot box, the third roller and the oil tanker with a set temperature of 150°C in turn, and are finally wound to obtain a cotton-like quick-drying yarn with an oil content of 3%.

[0046] The weight ratio of the honeycomb structure filament POY to the rigid yarn is 60:40; the honeycomb structure filament POY is a circular cross-section honeycomb structure filament POY (PET material) with a breaking elongation of 130% and 128dtex / 144F, which is equivalent to the honeycomb structure, moisture-absorbing and quick-drying lightweight fiber recorded in the Chinese invention patent with publication number CN118272951A; the rigid yarn is a circular cross-section T400 fiber with a breaking elongation of 35% and 79dtex / 46F.

[0047] Comparative Example 1 of the present invention is: a honeycomb structured filament POY (PET material) with a circular cross-section and a filament POY with a honeycomb structure of 128dtex / 144F and a breaking elongation of 130%, which is equivalent to the honeycomb structured, moisture-absorbing, quick-drying lightweight fiber recorded in the Chinese invention patent with publication number CN118272951A.

[0048] The cotton-like quick-drying yarns prepared in Examples 5 to 8, 128dtex / 144F ordinary cotton yarns, and the honeycomb structured filament POY of Comparative Example 1 were tested for cotton-like feel and moisture absorption and quick-drying performance. The test results are shown in Table 1.

[0049] The evaluation of moisture absorption and quick-drying performance is tested according to the standard document GB / T21655; the cotton-like feel is evaluated by 20 inexperienced people on the sensory evaluation of the fabric, and if the number of people who think the cotton-like feel is good is greater than or equal to 15, it is excellent, 10 to 14 people think it is good, 5 to 9 people think it is medium, and less than 5 people think it is poor.

[0050] Table 1

[0051] Embodiment 9 of the present invention is: The difference between the ninth embodiment and the eighth embodiment is that the temperature of the first heat box is 90°C, the speed of the second roller is 300 m / min, the temperature of the second heat box is 90°C, the air pressure of the network nozzle is 0.25 MPa, and the oil content of the imitation cotton quick-drying yarn is 3%.

[0052] Embodiment 10 of the present invention is: The difference between the tenth embodiment and the eighth embodiment is that the temperature of the first heat box is 170°C, the speed of the second roller is 400 m / min, the temperature of the second heat box is 170°C, the air pressure of the network nozzle is 0.35 MPa, and the oil content of the imitation cotton quick-drying yarn is 6%.

[0053] In summary, the cotton-like quick-drying yarn and preparation method thereof provided by the present invention adopt honeycomb-structured filament POY and rigid yarn, combined with specific process parameter adjustment to prepare cotton-like quick-drying yarn with excellent cotton-like effect, air permeability and moisture absorption and quick-drying performance.

[0054] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the specification of the present invention, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A cotton-like quick-drying yarn, characterized in that: The imitation cotton quick-drying yarn is a core-sheath structure, the core of the core-sheath structure is a rigid yarn, the sheath is a filament POY with a honeycomb structure, and the weight ratio of the core to the sheath is 3-7:7-3.

2. The cotton-like quick-drying yarn according to claim 1, characterized in that: The rigid yarn is filament FDY or filament DTY, and the filament FDY and filament DTY are inelastic filaments or parallel composite elastic filaments.

3. The method for preparing the cotton-like quick-drying yarn according to any one of claims 1 or 2, characterized in that: The filament POY with the honeycomb structure passes through a roller, a heat box, a false twister, a tension sensor, a second roller, a second heat box, a third roller and an oil tanker in sequence, and is finally wound into shape; the filament POY with the honeycomb structure is intertwined with the rigid yarn before passing through a roller, or is intertwined between the second roller and the second heat box.

4. The method for preparing the cotton-like quick-drying yarn according to claim 3, characterized in that: The temperature of the heat box is 90-170°C.

5. The method for preparing the cotton-like quick-drying yarn according to claim 3, characterized in that: The speed of the two rollers is 300-500 m / min.

6. The method for preparing the cotton-like quick-drying yarn according to claim 3, characterized in that: The temperature of the second heating box is 90-170°C.

7. The method for preparing the cotton-like quick-drying yarn according to claim 3, characterized in that: The filament POY of the honeycomb structure is intertwined with the rigid yarn through a network nozzle, and the air pressure of the network nozzle is 0.25-0.35 MPa.

8. The method for preparing the cotton-like quick-drying yarn according to claim 3, characterized in that: The oil content of the cotton-like quick-drying yarn is 3-6%.

9. The method for preparing the cotton-like quick-drying yarn according to claim 3, characterized in that: When the filament POY with the honeycomb structure is intertwined with the rigid yarn between the second roller and the second heat box, the filament POY with the honeycomb structure passes through the first roller, the first heat box, the false twister and the tension sensor of the texturing machine in sequence, and the rigid yarn passes through the zero roller and the second roller in sequence; then the filament POY with the honeycomb structure is intertwined with the rigid yarn through a network nozzle, and then passes through the second heat box, the third roller and the oil tanker in sequence, and finally is wound and formed to obtain the cotton-like quick-drying yarn.

10. The method for preparing the cotton-like quick-drying yarn according to claim 8, characterized in that: When the filament POY with the honeycomb structure and the rigid yarn are intertwined before passing through the first roller, the filament POY with the honeycomb structure and the rigid yarn pass through the zero roller of the texturing machine together, are intertwined through the network nozzle, and then pass through the first roller, the first heat box, the false twister, the tension sensor, the second roller, the second heat box, the third roller and the oil tanker in sequence, and are finally wound and formed to obtain the cotton-like quick-drying yarn.

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