A three-dimensional wrapped yarn and a preparation method thereof and a fabric
By employing a combination of core yarn and binding yarn in the yarn design, utilizing binding yarn segments of different densities and controlling the core yarn feeding speed, the problem of lack of three-dimensionality in yarn gradient design is solved, achieving a more layered and three-dimensional color gradient effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GUANGDONG VOCATIONAL & TECHNICAL COLLEGE
- Filing Date
- 2025-05-12
- Publication Date
- 2026-07-21
AI Technical Summary
The existing gradient designs of yarns lack a three-dimensional feel, resulting in monotonous color variations that fail to meet consumers' demands for unique styles and a sense of layering.
By employing a combination design of core yarn and fixed yarn, and by wrapping fixed yarn segments of different densities around the surface of the core yarn and controlling the feeding speed of the core yarn, an uneven color mixing effect is formed, enhancing the three-dimensional effect.
It achieves an overall color gradient effect in the yarn, while uneven color mixing exists in local areas, enhancing the sense of layering and three-dimensionality.
Smart Images
Figure CN120465164B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of textile technology, and specifically relates to a three-dimensional wrapped gradient yarn, its preparation method, and fabric. Background Technology
[0002] With the development of society and the economy, and the continuous improvement of people's living standards, consumers are increasingly focusing on the fashionability of clothing textiles, in addition to comfort, and seeking unique styles, such as color changes from light to dark or dark to light. To meet this consumer demand, continuously developing new yarns and fabrics has become an important task for the textile industry.
[0003] Currently, the gradient design of yarn colors is mainly achieved through the cycling of different shades of yarn with varying brightness and darkness. This is just a uniform color cycle gradient, which has the problem of poor three-dimensionality. Summary of the Invention
[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention provides a three-dimensional wrapped gradient yarn, its preparation method, and a fabric. The three-dimensional wrapped gradient yarn not only has an overall color gradient effect, but also has uneven color mixing in local areas, thus having a greater sense of layering and three-dimensionality.
[0005] In a first aspect, the present invention provides a three-dimensional wrapped gradient yarn, comprising a core yarn and a fixed yarn, wherein the core yarn and the fixed yarn are of different colors, and the fixed yarn is wrapped around the surface of the core yarn; the fixed yarn comprises a first group of yarn segments and a second group of yarn segments, wherein the first group of yarn segments adopts a stepped increasing or decreasing wrapping density, the first group of yarn segments includes at least three first sub-segments with different wrapping densities, and the second group of yarn segments includes a plurality of second sub-segments; a second sub-segment is provided between two adjacent first sub-segments, and the wrapping density of the second sub-segment is not within the range of the wrapping density of the two adjacent first sub-segments; or, a second sub-segment is provided within a single first sub-segment, and the second sub-segment has a wrapping density different from that of the single first sub-segment.
[0006] Specifically, a second yarn segment is provided between two adjacent first yarn segments, and the wrapping density of the second yarn segment is not within the range of the wrapping densities of the two adjacent first yarn segments. For example, the first group of yarn segments is divided into three first yarn segments A, B, and C with different wrapping densities, where the wrapping density of first yarn segment A is 300 turns / m, the wrapping density of first yarn segment B is 900 turns / m, and the wrapping density of first yarn segment C is 1200 turns / m. The lengths of first yarn segments A, B, and C are 30m, 40m, and 80m, respectively. A second yarn segment M is set between first yarn segments A and B. The wrapping density of the second yarn segment M can be 100 turns / m, 200 turns / m, 1000 turns / m, 1100 turns / m, etc., that is, the wrapping density of the second yarn segment M is not within the range of the wrapping densities of the two adjacent first yarn segments (300 turns / m to 900 turns / m).
[0007] The second group of yarn segments can further include a second yarn segment N, which is located between the first yarn segments B and C. Similarly, the wrapping density of the second yarn segment N is not in the range of 900 turns / m to 1200 turns / m.
[0008] In some embodiments of the present invention, the first group of yarn segments includes a first yarn segment A, a first yarn segment B, and a first yarn segment C; the second group of yarn segments includes a second yarn segment M and a second yarn segment N; the second yarn segment M is disposed between the first yarn segment A and the first yarn segment B; and the second yarn segment N is disposed between the first yarn segment B and the first yarn segment C; the wrapping density of the second yarn segment M is less than the relatively smaller wrapping density of the first yarn segment A and the first yarn segment B, and the wrapping density of the second yarn segment N is less than the relatively smaller wrapping density of the first yarn segment B and the first yarn segment C.
[0009] In some embodiments of the present invention, the first group of yarn segments includes a first yarn segment A, a first yarn segment B, and a first yarn segment C; the second group of yarn segments includes a second yarn segment M and a second yarn segment N; the second yarn segment M is disposed between the first yarn segment A and the first yarn segment B; and the second yarn segment N is disposed between the first yarn segment B and the first yarn segment C; the wrapping density of the second yarn segment M is greater than the relatively larger wrapping density of the first yarn segment A and the first yarn segment B, and the wrapping density of the second yarn segment N is greater than the relatively larger wrapping density of the first yarn segment B and the first yarn segment C.
[0010] For example, if the wrapping density of the first yarn segment A is 300 turns / m, the wrapping density of the first yarn segment B is 900 turns / m, and the wrapping density of the first yarn segment C is 1200 turns / m, then the wrapping density of the second yarn segment M is less than 300 turns / m, and the wrapping density of the second yarn segment N is less than 900 turns / m; or, the wrapping density of the second yarn segment M is greater than 900 turns / m, and the wrapping density of the second yarn segment N is greater than 1200 turns / m. This gives the yarn a more continuous three-dimensional feel. If the wrapping density of the second yarn segment M is less than 300 loops / m (e.g., 100 loops / m), and the wrapping density of the second yarn segment N is greater than 1200 loops / m (e.g., 1500 loops / m), then the five yarn segments are 300 loops / m, 100 loops / m, 900 loops / m, 1500 loops / m, and 1200 loops / m. The 100 loops / m yarn segment tends to show the color of the core yarn, while the 1500 loops / m yarn segment strengthens the display of the color of the fixed yarn, and the overall span will be relatively large.
[0011] In some embodiments of the present invention, when a second yarn segment is provided between two adjacent first yarn segments, the wrapping density of the second yarn segment is the same as the wrapping density of the previous or next first yarn segment of the two adjacent first yarn segments.
[0012] For example, the first group of yarn segments includes five first yarn segments with wrapping densities of 300 loops / m, 600 loops / m, 800 loops / m, 950 loops / m, and 1100 loops / m, respectively. The second group of yarn segments may include 1 to 4 second yarn segments. If there are 4 second yarn segments, then one second yarn segment is interspersed between every two adjacent first yarn segments. That is, second yarn segment M is located between two adjacent first yarn segments (with wrapping densities of 300 loops / m and 600 loops / m), and the wrapping density of second yarn segment M is 800 loops / m. Second yarn segment N is located between two adjacent first yarn segments (with wrapping densities of 600 loops / m and 800 loops / m), and the wrapping density of second yarn segment N is 950 loops / m, and so on. If there are 1 to 3 second yarn segments, the second yarn segment can be designed between any two adjacent first yarn segments. For example, if a second yarn segment is added between the two first yarn segments of 800 loops / m and 950 loops / m, then the second yarn segment can be 600 loops / m or 1100 loops / m.
[0013] In some embodiments of the present invention, when a second yarn segment is provided between two adjacent first yarn segments, the length of the second yarn segment is 10% to 25% of the length of the shorter of the two adjacent first yarn segments.
[0014] For example, the first group of yarn segments includes five first sub-segments (A, B, C, D, E), with wrapping densities of 300 loops / m, 600 loops / m, 800 loops / m, 950 loops / m, and 1100 loops / m, and lengths of 30m, 50m, 40m, 80m, and 20m, respectively. The second group of yarn segments includes two second sub-segments, M and N. Second sub-segment M is located between first sub-segments B and C, whose lengths are 50m and 40m respectively. Taking the smaller 40m, the length of second sub-segment M is 4-10m. Second sub-segment N is located between first sub-segments D and E, whose lengths are 80m and 20m respectively. Taking the smaller 20m, the length of second sub-segment N is 2-5m. The advantage of this design is that the second group of yarn segments, as interlaced segments, mainly enhances the three-dimensional effect. However, if the length is too long, severe layering will occur.
[0015] In some embodiments of the present invention, when a second yarn segment is provided within a single first yarn segment, the wrapping density of the second yarn segment is the same as the wrapping density of the previous or next first yarn segment of the single first yarn segment.
[0016] For example, the first group of yarn segments includes five first yarn segments (A, B, C, D, E) with wrapping densities of 300 turns / m, 600 turns / m, 800 turns / m, 950 turns / m, and 1100 turns / m, respectively. If a second yarn segment is added to the first yarn segment D (with a wrapping density of 950 turns / m), the wrapping density of the second yarn segment will be different from that of the first yarn segment D. That is, 950 turns / m is not used. Instead, the wrapping density of the previous or next first yarn segment adjacent to the first yarn segment D is preferred, which is 800 turns / m or 1100 turns / m.
[0017] In some embodiments of the present invention, when a second yarn segment is provided within a single first yarn segment, the second yarn segment is located within the range of 1 / 3 to 2 / 3 of the length of the single first yarn segment.
[0018] Specifically, each first yarn segment in the first group of yarn segments has a certain length, while the second yarn segment can be inserted at any length position of the first yarn segment, preferably within the range of 1 / 3 to 2 / 3 of the length of the first yarn segment. For example, if the length of a certain first yarn segment is 30m, then the second yarn segment can be added within the range of 10m to 20m produced. After the first yarn segment has been produced for 10m, a second yarn segment of length L can be added, and then the remaining 20m of the first yarn segment can be completed.
[0019] In some embodiments of the present invention, when a second yarn segment is provided within a single first yarn segment, the length of the second yarn segment is 20% to 50% of the smaller value within the range of 1 / 3 to 2 / 3 of the length of the single first yarn segment. For example, if the length of a first yarn segment is 30m, then a second yarn segment can be added within the range of 10m to 20m. The length of the second yarn segment is 20% to 50% of the smaller value of 10m, i.e., the length of the second yarn segment is 2m to 5m. The second yarn segment, as an interlaced yarn segment, mainly serves to enhance the three-dimensional effect; however, if its length is too long, severe layering will occur.
[0020] A second aspect of the present invention provides a method for preparing the three-dimensional wrapped gradient yarn described in the first aspect of the present invention, comprising the following steps:
[0021] The core yarn and the fixed yarn are fed into a hollow spindle separately. The hollow spindle rotates, and the fixed yarn wraps around the surface of the core yarn to form a whole, which is output by the output roller. The rotation speed of the hollow spindle is fixed. The wrapping density of the fixed yarn is changed by changing the output speed of the output roller to obtain the three-dimensional wrapped gradient yarn. The feeding speed of the core yarn is 1.005-1.15 times the output speed of the output roller.
[0022] Specifically, taking a fancy twisting machine as an example, the core yarn is fed through a hollow spindle, and the binding yarn is unwound from the yarn bobbin outside the hollow spindle and fed through the top of the hollow spindle. The hollow spindle rotates, and the binding yarn wraps around the surface of the core yarn, forming a whole that is output by the output roller. The rotation speed of the hollow spindle is fixed. By changing the output speed of the output roller, the wrapping density of the binding yarn is changed, resulting in the three-dimensional wrapped gradient yarn. The core yarn feeding speed is controlled to be 1.005-1.15 times the output speed of the output roller. Because the core yarn feeding speed is faster, the contact position between the core yarn and the binding yarn will fluctuate randomly, causing changes in the wrapping density of the binding yarn, which is more conducive to achieving a three-dimensional effect of uneven color mixing.
[0023] A third aspect of the present invention provides a fabric comprising the three-dimensional wrapped gradient yarn described in the first aspect of the present invention.
[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0025] The three-dimensional wrapped gradient yarn provided by the present invention, by interweaving a second group of yarn segments with a specific wrapping density in the first group of yarn segments and controlling the feeding speed of the core yarn, not only has a color gradient effect overall, but also has uneven color mixing in local areas, thus having a greater sense of layering and three-dimensionality. Attached Figure Description
[0026] Figure 1This is a photograph of the fabric obtained in Example 1 of the present invention.
[0027] Figure 2 A photograph of the actual fabric prepared for comparison 1. Detailed Implementation
[0028] To enable those skilled in the art to more clearly understand the technical solutions described in this invention, the following embodiments are provided for illustration. It should be noted that the following embodiments do not constitute a limitation on the scope of protection claimed by this invention.
[0029] Unless otherwise specified, the yarns or devices used in this invention can be obtained from conventional commercial sources or by existing known methods.
[0030] Example 1
[0031] A three-dimensional wrapped gradient yarn includes a white core yarn and a red fixing yarn, with the fixing yarn wrapped around the surface of the core yarn. The fixing yarn includes a first group of yarn segments and a second group of yarn segments. The first group of yarn segments includes three first yarn segments A, B, and C with different wrapping densities. The first yarn segment A has a wrapping density of 500 turns / m and a length of 20m, the first yarn segment B has a wrapping density of 700 turns / m and a length of 20m, and the first yarn segment C has a wrapping density of 900 turns / m and a length of 20m. The second group of yarn segments includes two second yarn segments M and N with different wrapping densities. The second yarn segment M has a wrapping density of 800 turns / m and a length of 3m and is located between the first yarn segments A and B. The second yarn segment N has a wrapping density of 500 turns / m and a length of 3m and is located between the first yarn segments B and C.
[0032] The above-mentioned method for preparing three-dimensional wrapped gradient yarn includes the following steps:
[0033] A fancy twisting machine is used to feed the core yarn through a hollow spindle. The binding yarn is unwound from the yarn bobbin outside the hollow spindle and fed through the top of the hollow spindle. The hollow spindle rotates, and the binding yarn wraps around the surface of the core yarn, forming a whole and being output by the output roller. The rotation speed of the hollow spindle is fixed. By changing the output speed of the output roller, the wrapping density of the binding yarn is changed, resulting in a three-dimensional wrapped gradient yarn. The core yarn feeding speed is set to 1.05 times the output speed of the output roller. This creates random fluctuations in the core yarn during the wrapping process, resulting in significant differences in wrapping density in local areas and improving the three-dimensional effect.
[0034] A fabric is prepared from the aforementioned three-dimensionally wrapped gradient yarn. A sample image of the fabric is shown below. Figure 1 As shown, Figure 1In the diagram, the color at point 1 is lighter, with a wrapping density of 500 turns / m; the color at point 2 is also lighter, with a wrapping density of 900 turns / m; and in the entire area where point 3 is located (not limited to the circled area), the red and white are not uniform, but rather there is more red in some areas and more white in others. This is due to random fluctuations in the wrapping density, resulting in uneven color mixing, which adds a sense of layering and three-dimensionality.
[0035] Comparative Example 1
[0036] A type of wrapped gradient yarn, comprising a white first yarn and a red second yarn, wherein the second yarn is wound in a spiral manner around the outer layer of the first yarn, and the wrapped gradient yarn is cyclically colored along the axial direction;
[0037] In a color gradient cycle, there are four winding yarn segments (A, B, C, and D) in sequence. The winding density of winding yarn segment A is 300 turns / m, the winding density of winding yarn segment B is 600 turns / m, the winding density of winding yarn segment C is 800 turns / m, and the winding density of winding yarn segment D is 1000 turns / m. The length of winding yarn segment A is 10m, the length of winding yarn segment B is 8m, the length of winding yarn segment C is 10m, and the length of winding yarn segment D is 15m.
[0038] A fabric is prepared by wrapping gradient yarns as described above. A sample image of the fabric is shown below. Figure 2 As shown, its gradient from dark to light is uniform, without any... Figure 1 The uneven color mixing in the image, meaning there is no effect of color mixing bit by bit. Figure 2 The three-dimensional effect is poor.
[0039] Example 2
[0040] A three-dimensional wrapped gradient yarn includes a white core yarn and a red fixing yarn, with the fixing yarn wrapped around the surface of the core yarn. The fixing yarn includes a first group of yarn segments and a second group of yarn segments. The first group of yarn segments includes three first yarn segments A, B, and C with different wrapping densities of 300, 600, and 1400 turns / m, and lengths of 50m, 50m, and 50m, respectively. The second group of yarn segments includes two second yarn segments with different wrapping densities, wherein there are 1-8 second yarn segments with a wrapping density of 800 turns / m and 9-14 second yarn segments with a wrapping density of 1400 turns / m. The eight second yarn segments with a wrapping density of 800 turns / m are distributed within the first yarn segment A. The first yarn segment A is followed by a second yarn segment with a wrapping density of 800 turns / m at lengths of 5, 10, 14, 21, 26, 30, 35, 40, and 46 m, respectively. The lengths of these eight second yarn segments are 1, 1, 0.6, 0.8, 1, 0.6, 0.8, and 1 m, respectively. Six second yarn segments with a wrapping density of 1400 turns / m are distributed within the first yarn segment B. The first yarn segment B is followed by a second yarn segment with a wrapping density of 1400 turns / m at lengths of 5, 10, 14, 18, 26, 35, and 45 m, respectively. The lengths of these six second yarn segments are 1, 0.6, 0.6, 0.6, 1.5, and 1 m, respectively.
[0041] The above-mentioned method for preparing three-dimensional wrapped gradient yarn includes the following steps:
[0042] A fancy twisting machine is used to feed the core yarn through a hollow spindle. The binding yarn is unwound from the yarn bobbin outside the hollow spindle and fed through the top of the hollow spindle. The hollow spindle rotates, and the binding yarn wraps around the surface of the core yarn to form a whole and is output by the output roller. The rotation speed of the hollow spindle is fixed. By changing the output speed of the output roller, the wrapping density of the binding yarn is changed, and a three-dimensional wrapped gradient yarn is output. The feeding speed of the core yarn is set to 1.1 times the output speed of the output roller.
[0043] Example 3
[0044] A three-dimensional wrapped gradient yarn includes a white core yarn and a red fixing yarn, with the fixing yarn wrapped around the surface of the core yarn. The fixing yarn includes a first group of yarn segments and a second group of yarn segments. The first group of yarn segments includes three first yarn segments A, B, and C with different wrapping densities. The first yarn segment A has a wrapping density of 500 turns / m and a length of 20m, the first yarn segment B has a wrapping density of 700 turns / m and a length of 20m, and the first yarn segment C has a wrapping density of 900 turns / m and a length of 20m. The second group of yarn segments includes two second yarn segments M and N with different wrapping densities. The second yarn segment M has a wrapping density of 800 turns / m and a length of 3m and is located between the first yarn segments A and B. The second yarn segment N has a wrapping density of 1000 turns / m and a length of 3m and is located between the first yarn segments B and C.
[0045] The preparation method of the three-dimensional wrapped gradient yarn in this example is the same as that in Example 1.
[0046] Example 4
[0047] A three-dimensional wrapped gradient yarn includes a white core yarn and a red fixing yarn, with the fixing yarn wrapped around the surface of the core yarn. The fixing yarn includes a first group of yarn segments and a second group of yarn segments. The first group of yarn segments includes five first sub-segments A, B, C, D, and E with different wrapping densities of 300 loops / m, 600 loops / m, 800 loops / m, 950 loops / m, and 1100 loops / m, respectively, and lengths of 30m, 50m, 40m, 80m, and 20m, respectively. The two yarn segments include three second yarn segments M, N, and X. Second yarn segment M is located between first yarn segments A and B, with a wrapping density of 800 turns / m and a length of 3m. Second yarn segment N is located between first yarn segments B and C, with a wrapping density of 950 turns / m and a length of 4m. Second yarn segment X is located between first yarn segments C and D, with a wrapping density of 1100 turns / m and a length of 4m.
[0048] The preparation method of the three-dimensional wrapped gradient yarn in this example is the same as that in Example 1.
[0049] Example 5
[0050] A three-dimensional wrapped gradient yarn includes a white core yarn and a red fixing yarn, with the fixing yarn wrapped around the surface of the core yarn. The fixing yarn includes a first group of yarn segments and a second group of yarn segments. The first group of yarn segments includes three first yarn segments A, B, and C with different wrapping densities of 500, 700, and 900 turns / m, and lengths of 30m, 30m, and 30m, respectively. The second group of yarn segments includes a second yarn segment distributed within the first yarn segment B. The first yarn segment B is followed by the second yarn segment at a length of 10m. The second yarn segment has a wrapping density of 500 turns / m and a length of 3m.
[0051] The preparation method of the three-dimensional wrapped gradient yarn in this example is the same as that in Example 1.
[0052] Fabrics prepared based on the three-dimensional wrapping gradient yarns of Examples 2-5 above all have a color gradient effect, and at the same time, there is uneven color mixing in local areas, which has a sense of layering and three-dimensionality.
[0053] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.
Claims
1. A three-dimensional wrapped gradient yarn, characterized in that, The device includes a core yarn and a fixed yarn, the core yarn and the fixed yarn being of different colors, the fixed yarn being wrapped around the surface of the core yarn; the fixed yarn includes a first group of yarn segments and a second group of yarn segments, the first group of yarn segments employing a stepped increasing or decreasing wrapping density, the first group of yarn segments including at least three first yarn segments with different wrapping densities, the second group of yarn segments including several second yarn segments; a second yarn segment is provided between two adjacent first yarn segments, the wrapping density of the second yarn segment being outside the range of the wrapping densities of the two adjacent first yarn segments; or, a second yarn segment is provided within a single first yarn segment, the second yarn segment having a different wrapping density than the single first yarn segment; The wrapping density of the core yarn is changed by altering the output speed of the output roller, and the core yarn feeding speed is 1.005-1.15 times the output speed of the output roller.
2. The three-dimensional wrapped gradient yarn according to claim 1, characterized in that, The first group of yarn segments includes a first yarn segment A, a first yarn segment B, and a first yarn segment C. The second group of yarn segments includes a second yarn segment M and a second yarn segment N. The second yarn segment M is located between the first yarn segment A and the first yarn segment B, and the second yarn segment N is located between the first yarn segment B and the first yarn segment C. The wrapping density of the second yarn segment M is less than the relatively smaller wrapping density of the first yarn segment A and the first yarn segment B, and the wrapping density of the second yarn segment N is less than the relatively smaller wrapping density of the first yarn segment B and the first yarn segment C.
3. The three-dimensional wrapped gradient yarn according to claim 1, characterized in that, The first group of yarn segments includes a first yarn segment A, a first yarn segment B, and a first yarn segment C. The second group of yarn segments includes a second yarn segment M and a second yarn segment N. The second yarn segment M is located between the first yarn segment A and the first yarn segment B, and the second yarn segment N is located between the first yarn segment B and the first yarn segment C. The wrapping density of the second yarn segment M is greater than the relatively larger wrapping density of the first yarn segment A and the first yarn segment B, and the wrapping density of the second yarn segment N is greater than the relatively larger wrapping density of the first yarn segment B and the first yarn segment C.
4. The three-dimensional wrapped gradient yarn according to claim 1, characterized in that, When a second yarn segment is provided between two adjacent first yarn segments, the wrapping density of the second yarn segment is the same as the wrapping density of the previous or next first yarn segment of the two adjacent first yarn segments.
5. The three-dimensional wrapped gradient yarn according to claim 4, characterized in that, The length of the second yarn segment is 10% to 25% of the length of the shorter of the two adjacent first yarn segments.
6. The three-dimensional wrapped gradient yarn according to claim 1, characterized in that, When a second yarn segment is provided within a single first yarn segment, the wrapping density of the second yarn segment is the same as the wrapping density of the previous or next first yarn segment of the single first yarn segment.
7. The three-dimensional wrapped gradient yarn according to claim 6, characterized in that, The second yarn segment is located within the range of 1 / 3 to 2 / 3 of the length of the single first yarn segment.
8. The three-dimensional wrapped gradient yarn according to claim 7, characterized in that, The length of the second yarn segment is 20% to 50% of the smaller value within the range of 1 / 3 to 2 / 3 of the length of the single first yarn segment.
9. The method for preparing the three-dimensional wrapped gradient yarn according to any one of claims 1-8, characterized in that, Includes the following steps: The core yarn and the fixed yarn are fed into a hollow spindle separately. The hollow spindle rotates, and the fixed yarn wraps around the surface of the core yarn to form a whole, which is output by the output roller. The rotation speed of the hollow spindle is fixed. The wrapping density of the fixed yarn is changed by changing the output speed of the output roller to obtain the three-dimensional wrapped gradient yarn. The feeding speed of the core yarn is 1.005-1.15 times the output speed of the output roller.
10. A fabric, characterized in that, Includes the three-dimensional wrapped gradient yarn as described in any one of claims 1-8.