A multi-color yarn and a method of manufacturing and using the same

Abstract

This invention relates to the field of textile technology, specifically to a multi-colored yarn, its preparation method, and its application. The preparation method of this multi-colored yarn includes the following steps: melting and extruding a color masterbatch containing a foaming agent, followed by yarn drawing; during yarn drawing, the foaming ratio is intermittently changed by adjusting the drawing temperature; when the foaming ratio is x times, the drawing rate is x+1 times the drawing rate without foaming. The preparation method of this invention, by adding a foaming agent to the color masterbatch and simultaneously controlling the foaming ratio and drawing rate of the yarn during drawing, obtains yarns with varying shades of color. These yarns are soft, have a good hand feel, and exhibit high color fastness.

Description

Technical Field

[0001] This invention relates to the field of textile technology, specifically to a multi-colored yarn, its preparation method, and its application. Background Technology

[0002] Existing multi-colored yarns are typically produced through dyeing or digital sublimation transfer. Both dyeing methods suffer from poor high-temperature fastness and color migration. Sublimation transfer, as disclosed in application number 201810535418.0, requires sequential steps of padding, drying, and printing. The applied sizing agent forms a thin film on the fabric surface, which not only affects the fabric's feel and flexural strength but also the adhesion of the coating. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a multi-colored yarn that is not prone to color migration, as well as its preparation method and application.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a method for preparing multi-color yarn, comprising the following steps: melting and extruding color masterbatch containing foaming agent and then drawing it into yarn; during the drawing process, the foaming ratio is intermittently changed by adjusting the drawing temperature; when the foaming ratio is x times, the drawing rate is x+1 times the drawing rate when no foaming is performed.

[0005] Another technical solution adopted in this invention is: a multicolor yarn prepared by the above-mentioned method for preparing multicolor yarn.

[0006] Another technical solution adopted in this invention is the application of the above-mentioned multi-colored yarn in woven fabrics.

[0007] The beneficial effects of the present invention are as follows: The preparation method of the present invention adds a foaming agent to the masterbatch and simultaneously controls the foaming ratio and spinning rate of the yarn during spinning to obtain yarns with different shades of color. The yarns are soft, have a good hand feel and high color fastness. Attached Figure Description

[0008] Figure 1 The image shows the multicolored yarn prepared according to Example 1 of the present invention;

[0009] Figure 2 The image shows the multicolored yarn prepared according to Example 2 of the present invention. Detailed Implementation

[0010] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0011] A method for preparing multi-colored yarn includes the following steps: melting and extruding color masterbatch containing foaming agent and then drawing it into yarn. During the drawing process, the foaming ratio is intermittently changed by adjusting the drawing temperature. When the foaming ratio is x times, the drawing rate is x+1 times the drawing rate when no foaming is used.

[0012] As can be seen from the above description, the beneficial effects of this invention are as follows: This invention adds a foaming agent to the masterbatch; the higher the foaming ratio, the lighter the yarn color and the thicker the yarn diameter. To obtain uniform yarn, the drawing speed is adjusted simultaneously; a faster drawing speed results in thinner yarn and a further lighter yarn color. This invention obtains yarns of varying shades by controlling the foaming ratio and drawing speed of the yarn during drawing. This yarn is soft, has high color fastness, and is lighter in weight, solving the physical property problems of color migration, poor bending resistance, and poor adhesion in cloud-dyed or sublimation transfer fabrics. Furthermore, this method is easy to adjust, allowing for rapid adjustment of production conditions to obtain yarns of another color, which is more efficient than the traditional method of changing dye liquors to produce multi-colored yarns.

[0013] Furthermore, the raw materials for color masterbatches include PET (polyterephthalic acid plastic) and foaming agents, as well as pigments or dyes.

[0014] Furthermore, the temperature resistance of the pigment or dye is greater than 300℃.

[0015] Furthermore, by weight percentage, the raw materials of the masterbatch include 76-80% PET and 0.5-1.5% foaming agent, as well as 18-22% pigment or dye.

[0016] Preferably, the raw materials of the color masterbatch, by weight percentage, include 76-80% PET and 1% foaming agent, and also include 20% pigment or dye.

[0017] As can be seen from the above description, the foaming ratio can be controlled by adjusting the content of the foaming agent and the spinning rate. If the foaming ratio is too low, the color depth will not change significantly, and if the foaming ratio is too high, the yarn may be too hollow and soft, and lack toughness.

[0018] Furthermore, the molecular weight of PET is 3000–30000 g / mol.

[0019] Preferably, the molecular weight of PET is 10,000 to 15,000 g / mol.

[0020] Furthermore, the raw materials for color masterbatches also include antioxidants, dispersants, and coupling agents.

[0021] As can be seen from the above description, coupling agents are used to enhance the bonding effect between pigments or dyes and resin carriers; antioxidants are used to enhance the anti-yellowing properties of PET resins.

[0022] Furthermore, by weight percentage, the raw materials of the color masterbatch include 0.1-1% antioxidant, 0.9-4% dispersant and 0.5-1% coupling agent.

[0023] Furthermore, the antioxidant is a phosphite antioxidant.

[0024] Furthermore, the rate of change during the drawing temperature is 9–11 °C / s.

[0025] As can be seen from the above description, the rate of change during the spinning temperature change is relatively fast, and the yarn color is more stable.

[0026] Furthermore, the temperature of melt extrusion is lower than the foaming temperature.

[0027] Furthermore, the melt extrusion temperature is greater than or equal to 250°C.

[0028] As can be seen from the above description, 250℃ is the conventional melting and extrusion temperature of a spinning machine. Temperatures below this may cause extrusion blockage.

[0029] Furthermore, the foaming ratio is 1 to 10 times.

[0030] As can be seen from the above description, a foaming ratio exceeding 10 times may result in yarn that is too hollow and soft, lacking in toughness.

[0031] Another technical solution adopted in this invention is: a multicolor yarn prepared by the above-mentioned method for preparing multicolor yarn.

[0032] Another technical solution adopted in this invention is the application of the above-mentioned multi-colored yarn in woven fabrics.

[0033] As can be seen from the above description, the fabric woven using the multicolored yarns of the present invention has a monochrome effect with different brightness levels, and the fabric is softer and lighter.

[0034] Furthermore, the aforementioned multicolored yarns are used in the weaving of gradient fabrics.

[0035] The raw materials in the following embodiments include:

[0036] Antioxidant: Jiaxing Zhongcheng's antioxidant ZG203; dispersant: Lubrizol DP310 (polyester modified polyphosphate dispersant); coupling agent: silane coupling agent KH560; dye: Ningbo Longxin SR122 transparent navy blue R (temperature resistance greater than 300℃); foaming agent: Sekisui Chemical EM406.

[0037] Embodiment 1 of the present invention is a method for preparing multi-colored yarn, comprising the following steps:

[0038] S1. Preparation of color masterbatch: 76.5 kg of PET with a molecular weight of 10000 g / mol, 20 kg of dye, 1 kg of foaming agent, 0.7 kg of antioxidant, 1 kg of dispersant and 0.8 kg of coupling agent are mixed, melted and granulated at 250℃ to obtain color masterbatch.

[0039] S2. Fiber Drawing: After the masterbatch is melt-extruded at 250℃, it is drawn into fibers. There are two states during fiber drawing. In the first state, the fiber is drawn for 100cm and then switched to the second state. In the second state, the fiber is drawn for 200cm and then switched back to the first state. The temperature change rate when switching between the two states is 10℃ / s. The first state is the non-foaming state, the fiber drawing temperature is 250℃, and the fiber drawing speed is 10cm / s. The second state is the foaming state, the foaming ratio is 1, and the fiber drawing speed is 20cm / s.

[0040] The effect of the multi-colored yarn obtained in Example 1 is shown in the figure. Figure 1 As shown.

[0041] Comparative Example 1 of the present invention is: a method for preparing ordinary yarn, comprising the following steps:

[0042] S1. Preparation of color masterbatch: 77.5 kg of PET with a molecular weight of 10000 g / mol, 20 kg of dye, 0.7 kg of antioxidant, 1 kg of dispersant and 0.8 kg of coupling agent are mixed, melted and granulated at 250 °C to obtain color masterbatch.

[0043] S2. Fiber drawing: After the masterbatch is melt-extruded at 250℃, it is drawn into fibers. The fiber drawing temperature is 250℃ and the fiber drawing speed is 10cm / s.

[0044] Embodiment 2 of the present invention is: a method for preparing multi-colored yarn, the steps of which are as follows:

[0045] S1. Preparation of color masterbatch: 80 kg of PET with a molecular weight of 3000 g / mol, 18 kg of dye, 0.5 kg of foaming agent, 0.1 kg of antioxidant, 0.9 kg of dispersant and 0.5 kg of coupling agent are mixed, melted and granulated at 250 °C to obtain color masterbatch.

[0046] S2. Fiber Drawing: After the masterbatch is melt-extruded at 250℃, it is drawn into fibers. There are four states during fiber drawing, and the process switches to the next state after each 100cm fiber. The temperature change rate during the switching of the four states is 9℃ / s. The first state is the non-foaming state, with a fiber drawing temperature of 250℃ and a fiber drawing speed of 5cm / s. The second state is the foaming state, with a foaming ratio of 1 and a fiber drawing speed of 10cm / s. The third state is the foaming state, with a foaming ratio of 3 and a fiber drawing speed of 20cm / s. The fourth state is the foaming state, with a foaming ratio of 5 and a fiber drawing speed of 30cm / s.

[0047] The effect of the multi-colored yarn obtained in Example 2 can be found in the following example. Figure 2 As shown.

[0048] Embodiment 3 of the present invention is a method for preparing multi-colored yarn, comprising the following steps:

[0049] S1. Preparation of color masterbatch: 76 kg of PET with a molecular weight of 30000 g / mol, 21 kg of dye, 0.5 kg of foaming agent, 1 kg of antioxidant, 1 kg of dispersant and 0.5 kg of coupling agent are mixed, melted and granulated at 250°C to obtain color masterbatch.

[0050] S2. Fiber Drawing: After the masterbatch is melt-extruded at 250℃, it is drawn into fibers. There are two states during fiber drawing. In the first state, the fiber is drawn for 100cm and then switched to the second state. In the second state, the fiber is drawn for 200cm and then switched back to the first state. The temperature change rate when switching between the two states is 11℃ / s. The first state is the non-foaming state, the fiber drawing temperature is 250℃, and the fiber drawing speed is 10cm / s. The second state is the foaming state, the foaming ratio is 2 times, and the fiber drawing speed is 20cm / s.

[0051] Embodiment four of the present invention is: a multi-colored yarn, obtained by the preparation method of Embodiment one, the effects of which are shown in the figure. Figure 1 As shown.

[0052] Embodiment 5 of the present invention is: a gradient fabric woven from the multi-colored yarns of Embodiment 4.

[0053] Fabric 1 and Fabric 1', each in size A4, were woven using the yarns from Example 1 and Comparative Example 1, respectively. Fabric 1 has a weight of 8.12 g / m². 2 The warp density is 50 threads / inch, and the weft density is 40 threads / inch; the weight of 1' fabric is 9.97 g / m². 2 The warp density is 50 threads / inch, and the weft density is 40 threads / inch. The softness of fabric 1 and fabric 1' was tested by placing the fabric face down on a flat surface and measuring the angle of curvature. A lower curvature angle indicates better softness. The test results are shown in Table 1. The colorfastness of fabric 1 and fabric 1' was tested according to ISO 105-P01 (180s 190℃). The test results are shown in Table 1.

[0054] Table 1

[0055] Softness Color fastness Fabric 1 10° Level 4-5 Fabric 1' 30° Level 4-5

[0056] In summary, the multi-colored yarn, its preparation method, and its applications provided by this invention have the following advantages:

[0057] 1. By adjusting the foaming ratio and drawing speed of the yarn during the drawing process, yarns with varying shades of color can be obtained. These yarns are soft and have high color fastness.

[0058] 2. The foaming ratio is controlled by adjusting the content of the foaming agent and the spinning rate, and the foaming ratio shall not exceed 10 times in order to maintain a certain degree of toughness.

[0059] 3. The rate of temperature change during yarn drawing is faster, resulting in more stable yarn color.

[0060] 4. The multi-colored yarn of this invention can be used to directly weave gradient fabrics.

[0061] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for preparing multi-colored yarn, characterized in that, Includes the following steps: After the masterbatch containing foaming agent is melt-extruded, it is drawn into fibers. During the drawing process, the foaming ratio is intermittently changed by adjusting the drawing temperature. When the foaming ratio is x times, the drawing rate is x+1 times the drawing rate when no foaming is performed.

2. The method for preparing multicolored yarn according to claim 1, characterized in that, The raw materials for the masterbatch include PET and foaming agent, as well as pigments or dyes.

3. The method for preparing multicolored yarn according to claim 2, characterized in that, The raw materials of the masterbatch, by weight percentage, include 76-80% PET and 0.5-1.5% foaming agent, and also include 18-22% pigment or dye.

4. The method for preparing multicolored yarn according to claim 2, characterized in that, The raw materials for the color masterbatch also include antioxidants, dispersants, and coupling agents.

5. The method for preparing multicolored yarn according to claim 4, characterized in that, The raw materials of the masterbatch, by weight percentage, include 0.1-1% antioxidant, 0.9-4% dispersant and 0.5-1% coupling agent.

6. The method for preparing multicolored yarn according to claim 1, characterized in that, The rate of temperature change during wire drawing is 9–11 °C / s.

7. The method for preparing multicolored yarn according to claim 1, characterized in that, The temperature of the melt extrusion is lower than the foaming temperature.

8. The method for preparing multicolored yarn according to claim 1, characterized in that, The foaming ratio is 1 to 10 times.

9. A multicolor yarn prepared by the method for preparing multicolor yarn according to any one of claims 1-8.

10. The application of the multicolored yarn as described in claim 9 in woven fabrics.

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