A lace fabric with multiple variable patterns and a preparation method thereof

Abstract

A lace fabric with a multi-variable texture and a preparation method thereof, including a fabric body. The fabric body has a texture, and the texture includes a texture unit structure. The texture unit structure is formed by alternately knitting the yarns Y1 and Y2 into a loop structure within one pattern repeat in an overlapping and separating manner. The texture unit structure includes several columns of longitudinal texture units. The longitudinal texture unit includes a current column loop structure and other column loop structures. The other column loop structures of the longitudinal texture unit are integrally knitted by offsetting the yarns of the current column loop structure by W stitches. While maintaining the external decoration, the present invention improves the warmth retention property and can be widely applied to underwear, corsets, sports and casual clothing.

Description

Technical Field

[0001] The present invention belongs to the technical field of clothing fabrics, and particularly relates to a lace fabric with variable background patterns and a preparation method thereof. Background Art

[0002] With the innovation of textile equipment and the progress of textile technology, lace fabric, as a popular fashion fabric, has been more and more widely used since it entered the consumer market, such as in underwear, leisure decoration, etc.

[0003] In order to achieve a transparent effect, traditional lace fabrics make full use of hole elements in design. However, these holes, large or small, while adding the sensuality and beauty of lace fabrics, also greatly affect the shielding performance of clothing;

[0004] Similarly, although these holes can enhance their breathability and make wearing more comfortable, the warmth retention of lace fabrics is not considered;

[0005] In addition, the change of the ground comb organization of traditional lace fabrics changes with the structural change of the weft insertion ground comb, which is relatively single and requires some innovative changes;

[0006] The easy unraveling of traditional lace fabrics is also a potential risk in their application. In response to the unraveling risk, the traditional improvement scheme is to increase the knitting density and form horizontal locking lines at large length changes of the loop-forming ground comb, so that the unraveling situation stops at the changing position. However, it greatly affects the appearance beauty of the fabric, and the risk of unraveling still exists. Another improvement scheme for unraveling is to use hot-melt filament yarns and utilize their property of melting and sticking after high temperature to achieve the purpose of anti-unraveling. However, the hot-melt yarn becomes hard after high-temperature melting and sticking, which will directly affect the smoothness and good elasticity of the fabric, so it cannot be widely put into production.

[0007] After querying relevant patents and other materials of lace fabrics in the clothing industry, there is still no information that can comprehensively describe and effectively solve the above defects and risks, such as:

[0008] CN 205062362U describes a warp knitting machine for knitting elastic lace with variable mesh, including a comb rack and multiple groups of combs. An auxiliary knitting ground tissue comb is arranged at the required position to form a mesh effect different from the ground tissue process structure, and the knitted mesh effect can be ensured to be stable.

[0009] CN103469469B describes a geometric element warp knitting lace and a preparation method thereof: it is woven by a lace machine with two raw materials of nylon and cation-modified polyester filaments, and after weaving, through a dyeing and finishing process, a geometric element warp knitting lace is obtained.

[0010] CN107287755B describes a knitting method for a multi-comb warp knitting machine: adding a set of active warp feeding devices to feed out spandex yarns, and the spandex yarns are fed into the same or different looping ground combs as the non-spandex yarns, so that the damaged ground yarn loops and the patterned yarns are not easy to fall apart.

[0011] Among the above patents, CN 205062362U is designed based on the permeability of traditional lace and strengthens the effect of mesh (i.e. holes) to stabilize the effect, and CN103469469B increases the diversity of lace fabrics in terms of color, but they cannot improve the defects of traditional lace fabrics in terms of shielding and warmth retention. The addition of an active warp-feeding device in CN107287755B will inevitably increase production and maintenance costs, and the raw materials must be filaments with spandex, which also limits the style and type of fabrics, and the curing mode of filaments and spandex forming loops in the same direction will also affect the fabric pattern and appearance.

[0012] In summary, the consumer market needs a new generation of lace fabric that can maintain the advantages of traditional lace fabrics such as beautiful patterns, strong three-dimensional sense, various patterns, and beautiful and transparent appearance without fundamentally affecting it, while improving its shielding, warmth retention and shedding properties without adding additional costs. Summary of the invention

[0013] In order to solve the above technical problems, the present invention provides a lace fabric with multiple changeable shading patterns.

[0014] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0015] A lace fabric with multiple changeable shading patterns comprises a fabric body, the fabric body having a shading pattern, the shading pattern comprising a shading pattern unit structure, the shading pattern unit structure comprises a yarn Y1 and a yarn Y2 forming a loop structure in a pattern cycle, and the loop structure is alternately woven in an overlapping and separate manner, the shading pattern unit structure comprises a plurality of columns of longitudinal shading pattern units, the longitudinal shading units comprise a current column of loop structures and other column of loop structures, and the other column of loop structures of the longitudinal shading units are integrally woven by offsetting the yarn of the current column of loop structures by W needles.

[0016] The shading unit structure also includes a weft insertion structure layer formed by weaving the yarn Y3 and the yarn Y4 with a weft insertion structure through a patterned yarn comb bar.

[0017] The shading unit structure is N W x N L The loop structure, where N L N is the number of rows that the yarn crosses during the weaving process. W It is the number of stitches that the yarn is offset during the knitting process.

[0018] When the yarn Y1 is woven in a straight chain structure, NW1 = 1, N L1 = 1; When the yarn Y2 is knitted in a variable chain stitch structure, 5 ≥ N W2 ≥ 1, and 12 ≥ N L2 ≥ 1, N W1 represents the number of offset stitches of the yarn Y1, N W2 represents the number of offset stitches of the yarn Y2; N L1 represents the number of courses spanned by the loops of the yarn Y1, N L2 represents the number of courses spanned by the loops of the yarn Y2.

[0019] When the yarn Y1 is knitted in a variable chain stitch structure, 5 ≥ N W1 ≥ 1, and 12 ≥ N L1 ≥ 1; When the yarn Y2 is knitted in a straight chain stitch structure, N W2 = 1, and N L2 = 1, N W1 represents the number of offset stitches of the yarn Y1, N W2 represents the number of offset stitches of the yarn Y2; N L1 represents the number of courses spanned by the loops of the yarn Y1, N L2 represents the number of courses spanned by the loops of the yarn Y2.

[0020] When the yarn Y1 is knitted in a variable chain stitch structure, 5 ≥ N W1 ≥ 1, and 12 ≥ N L1 ≥ 1; When the yarn Y2 is knitted in a variable chain stitch structure, 5 ≥ N W2 ≥ 1, and 12 ≥ N L2 ≥ 1, N W1 represents the number of offset stitches of the yarn Y1, N W2 represents the number of offset stitches of the yarn Y2; N L1 represents the number of courses spanned by the loops of the yarn Y1, N L2 represents the number of courses spanned by the loops of the yarn Y2.

[0021] Both the yarn Y1 and the yarn Y2 are filaments with a linear density of 10 - 150 D; or both the yarn Y1 and the yarn Y2 are spandex with a linear density of 20 - 100 D; or both the yarn Y1 and the yarn Y2 are composite yarns composed of filaments and spandex with a linear density of 20 - 150 D, where the linear density of the filament is 10 - 100 D and the linear density of the spandex is 10 - 70 D.

[0022] The yarn Y3 is a filament with a linear density of 20 - 140 D; or the yarn Y3 is a spandex elastic yarn with a linear density of 20 - 280 D; or the yarn Y3 is a composite yarn composed of filaments and spandex with a linear density of 20 - 150 D, where the linear density of the filament is 10 - 100 D and the linear density of the spandex is 10 - 70 D.

[0023] The yarn Y4 is spandex elastic yarn with a linear density of 70-560D; or the yarn Y4 is filament with a linear density of 30-280D.

[0024] The base unit structure of the fabric body is formed by alternately weaving yarn Y1 and yarn Y2 in a loop structure in a pattern cycle in an overlapping and separate manner. After the yarn Y1 and yarn Y2 are woven in the current longitudinal loop structure, they will be laterally offset to the left or right by W needles to continue weaving, forming a knot N. W x N L The braided structure, where N W is the number of offset stitches of the yarn during the knitting process, N L It is the number of horizontal rows spanned by the coils of the yarn during the weaving process. Through the weft insertion structure with yarn Y3 and yarn Y4 and a plurality of pattern yarn combs, a lace fabric with a variety of changeable background patterns is formed.

[0025] The present invention weaves the yarn into a loop structure and performs a lateral offset of a corresponding number of needles to form a loop structure on the diagonal, thereby forming a weaving structure in the vertical, horizontal and diagonal directions. Different coverage rates can be achieved by adjusting the offset of the yarn, thereby adjusting the overall permeability and air permeability, thereby adjusting the permeability of the fabric, changing the air permeability of the holes, and improving the warmth retention of the fabric. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Attached Figure 1 :Shading unit N W x N L The diagonal yarn Y in W 、N L Schematic diagram of different directions (Ya, Yb, Yc) due to different values ​​of ;

[0027] Attached Figure 2 : Schematic diagram of layered threading of yarns Y1 and Y2;

[0028] Attached Figure 3 : In the embodiment of the present invention, the structure of Y1 is an open chain structure (0-1 / 1-0 / / );

[0029] Attached Figure 4 : In the embodiment of the present invention, the structure of Y1 is an open chain structure (1-0 / 0-1 / / );

[0030] Attached Figure 5 : In the embodiment of the present invention, the structure of Y1 is a closed chain structure (0-1 / 0-1 / / );

[0031] Attached Figure 6 : In the embodiment of the present invention, the structure of Y1 is a closed chain structure (1-0 / 1-0 / / );

[0032] AttachedFigure 7 : In the embodiment of the present invention, the structure of Y2 is an open-loop variable braiding structure (0-1 / 1-0 / 0-1 / 1-2 / / ).

[0033] Attached Figure 8 : In the embodiment of the present invention, the structure of Y2 is an open-loop variable braiding structure (1-0 / 0-1 / 1-0 / 1-2 / / ).

[0034] Attached Figure 9 : In the embodiment of the present invention, the structure of Y2 is a closed-loop variable braiding structure (0-1 / 0-1 / 0-1 / 1-2 / / ).

[0035] Attached Figure 10 : In the embodiment of the present invention, the structure of Y2 is a closed-loop variable braiding structure (1-0 / 1-0 / 1-0 / 1-2 / / ).

[0036] Attached Figure 11 : In the embodiment of the present invention, the structure of Y3 is a weft insertion structure (0-0 / 2-2 / / );

[0037] Attached Figure 12 : In the embodiment of the present invention, the structure of Y3 is a weft insertion structure (2-2 / 0-0 / / );

[0038] Attached Figure 13 : In the embodiment of the present invention, the structure of Y4 is a weft insertion structure (0-0 / 1-1 / / );

[0039] Attached Figure 14 : In the embodiment of the present invention, the structure of Y4 is a weft insertion structure (1-1 / 0-0 / / );

[0040] Attached Figure 15 : One of the schematic diagrams of the combined structure of Y1, Y2, Y3, and Y4 in the embodiment of the present invention;

[0041] Attached Figure 16 : One of the schematic diagrams of the combined structure of Y1 and Y2 in the embodiment of the present invention. Detailed implementation manners

[0042] To further understand the features, technical means, specific purposes, and functions achieved by the present invention, the present invention will be further described in detail below in combination with the drawings and specific implementation manners.

[0043] As attached Figure 1As shown in the figure, a lace fabric with variable shading includes a fabric body. The fabric body has a shading, and the shading includes a shading unit structure. The shading unit structure is formed by alternately knitting the yarns Y1 and Y2 into a loop structure within one pattern repeat in an overlapping and separating manner. The shading unit structure includes several columns of longitudinal shading units. The longitudinal shading unit includes a current column loop structure and other column loop structures. The other column loop structures of the longitudinal shading unit are integrally knitted by offsetting the yarns of the current column loop structure by W needle counts.

[0044] During specific preparation, after the yarns Y1 and Y2 are knitted into the current longitudinal loop structure, they will be laterally offset by W needle counts to the left or right direction and continue knitting to form a node N W x N L knitting structure, where N W is the offset needle count of the yarn during knitting, and N L is the number of horizontal rows spanned by the loops of the yarn during knitting. By combining the weft insertion structure of the yarns Y3 and Y4 with multiple pattern yarn combs, a lace fabric with variable shading is knitted. By offsetting the corresponding needle counts of the yarns Y1 and Y2 to the left or right, the formed N W x N L knitting structure contains diagonal elements of yarn offset, that is, when the same yarn is knitted into a loop structure longitudinally, it also offsets the corresponding needle counts and then continues knitting. By adjusting the offset needle count of the yarn, different coverage rates of the yarn grid can be achieved, the permeability and air permeability of the overall unit can be adjusted, and thus the permeability of the fabric can be adjusted, the air permeability of the holes can be changed, and the warmth retention of the fabric can be improved. The diagonal yarns have different directions of lateral offset as the values of N W and N L vary. In the appendix Figure 1 , each grid horizontally is 1 needle, and each grid vertically is 1 horizontal row.

[0045] The shading unit structure also includes a weft insertion structure layer knitted by the yarns Y3 and Y4 in a weft insertion structure through pattern yarn combs. By the loop structure of the yarns Y1 and Y2 and the weft insertion structure of the yarns Y3 and Y4, combined with multiple pattern yarn combs, a lace fabric with variable shading is knitted.

[0046] When the yarn Y1 is knitted in a straight knitting chain structure, N W1 = 1, and N L1 = 1; when the yarn Y2 is knitted in a variable knitting chain structure, 5 ≥ N W2 ≥ 1, and 12 ≥ N L2 ≥ 1. N W1 represents the offset needle count of the yarn Y1, and N W2 represents the offset needle count of the yarn Y2; N L1Represents the number of courses spanned by the loops of yarn Y1, N L2 Represents the number of courses spanned by the loops of yarn Y2.

[0047] When the yarn Y1 is knitted with a variable chain stitch structure, 5 ≥ N W1 ≥ 1, and 12 ≥ N L1 ≥ 1; when the yarn Y2 is knitted with a straight chain stitch structure, N W2 = 1, and N L2 = 1, N W1 Represents the offset needles of yarn Y1, N W2 Represents the offset needles of yarn Y2; N L1 Represents the number of courses spanned by the loops of yarn Y1, N L2 Represents the number of courses spanned by the loops of yarn Y2.

[0048] When the yarn Y1 is knitted with a variable chain stitch structure, 5 ≥ N W1 ≥ 1, and 12 ≥ N L1 ≥ 1; when the yarn Y2 is knitted with a variable chain stitch structure, 5 ≥ N W2 ≥ 1, and 12 ≥ N L2 ≥ 1, N W1 Represents the offset needles of yarn Y1, N W2 Represents the offset needles of yarn Y2; N L1 Represents the number of courses spanned by the loops of yarn Y1, N L2 Represents the number of courses spanned by the loops of yarn Y2.

[0049] For the knitting of yarn Y1, different guide bar patterns can be used, as shown in the appendix Figure 3 As shown, yarn Y1 uses an open chain stitch structure with a guide bar pattern of 0-1 / 1-0 / / ; as Figure 4 shown, yarn Y1 uses an open chain stitch structure with a guide bar pattern of 1-0 / 0-1 / / ; as shown in the appendix Figure 5 shown, yarn Y1 uses a closed chain stitch structure with a guide bar pattern of 0-1 / 0-1 / / ; as shown in the appendix Figure 6 shown, yarn Y1 uses a closed chain stitch structure with a guide bar pattern of 1-0 / 1-0 / / .

[0050] For the knitting of yarn Y2, different guide bar patterns can be used, as shown in the appendix Figure 7 As shown, yarn Y2 uses an open variable chain stitch structure with a guide bar pattern of 0-1 / 1-0 / 0-1 / 1-2 / / ; as shown in the appendix Figure 8 shown, yarn Y2 uses an open variable chain stitch structure with a guide bar pattern of 1-0 / 0-1 / 1-0 / 1-2 / / ; as shown in the appendix Figure 9 shown, yarn Y2 uses a closed variable chain stitch structure with a guide bar pattern of 0-1 / 0-1 / 0-1 / 1-2 / / ; as shown in the appendix Figure 10As shown, the yarn Y2 adopts a closed-loop changing chain stitch structure with a guide bar notation of 1-0 / 1-0 / 1-0 / 1-2 / / .

[0051] The yarn Y3 can be knitted using a weft insertion structure with a guide bar notation of 0-0 / 2-2 / / , as shown in the appendix Figure 11 shown; or as shown in the appendix Figure 12 shown, knitted using a weft insertion structure with a guide bar notation of 2-2 / 0-0 / / . The yarn Y4 can be knitted using a weft insertion structure with a guide bar notation of 0-0 / 1-1 / / , as shown in the appendix Figure 13 shown; or the yarn Y4 can be knitted using a weft insertion structure with a guide bar notation of 1-1 / 0-0 / / , as shown in the appendix Figure 14 shown.

[0052] Both the yarn Y1 and the yarn Y2 are filaments with a linear density of 10-150 D; or both the yarn Y1 and the yarn Y2 are spandex with a linear density of 20-100 D; or both the yarn Y1 and the yarn Y2 are composite yarns composed of filaments and spandex with a linear density of 20-150 D, where the linear density of the filament is 10-100 D and the linear density of the spandex is 10-70 D.

[0053] The yarn Y3 is a filament with a linear density of 20-140 D; or the yarn Y3 is a spandex elastic filament with a linear density of 20-280 D; or the yarn Y3 is a composite yarn composed of filaments and spandex with a linear density of 20-150 D, where the linear density of the filament is 10-100 D and the linear density of the spandex is 10-70 D.

[0054] The yarn Y4 is a spandex elastic filament with a linear density of 70-560 D; or the yarn Y4 is a filament with a linear density of 30-280 D.

[0055] During specific knitting, it is knitted using a lace machine with a knitting needle density of 28 per inch. 1. Material preparation: After reasonably selecting the loom and the yarns used according to the process requirements, the warping operator prepares the raw materials on the creel according to the process sheet. Among them, the yarns Y1 and Y2 are prepared on the same set of creels through the method of sectional warping. If Y1 and Y2 are different types of yarns, in order to facilitate the production of the loom, during sectional warping, it is necessary to adjust the tensile modulus of the yarns Y1 and Y2 and control the tension difference within a reasonable range.

[0056] 2. Yarn threading: As shown in the appendix Figure 1 shown, the yarns Y1 and Y2 after sectional warping are provided by the same set of creel GB1 in layers. The yarn Y1 passes through the cross bar 1 and then through the tension bar 21, and then passes through the yarn dividing reed 31, and finally is threaded onto the guide eye 41 of the comb Y1. The yarn Y2 passes through the cross bar 1 and then through the tension bar 22, and then passes through the yarn dividing reed 32, and finally is threaded onto the guide eye 42 of the comb Y2. Similarly, the yarns on other sets of creels are threaded onto the guide eyes of the corresponding combs according to the process sheet.

[0057] 3. Adjust the tension and start the machine. After all the yarns are threaded as required, hang out the end of the fabric, and then adjust the tension of the yarns on each set of bobbins according to the actual situation on the machine to ensure it is within a reasonable range. Check if there are any other problems to be dealt with. After all are eliminated, the machine can be started for knitting.

[0058] As shown in the Figure 15 attachment, the fabric body is woven by the straight tricot structure of filament Y1, the variable tricot structure of filament Y2, the weft insertion structure of filament Y3, the weft insertion structure of spandex Y4, and then combined with multiple fancy yarn combs to form an elastic lace fabric with different fancy effects.

[0059] As shown in the Figure 16 attachment, the fabric body is woven by the straight tricot structure of filament Y1, the variable tricot structure of filament Y2, and then combined with multiple fancy yarn combs to form a non-elastic lace fabric with different fancy effects.

[0060] As shown in the Figure 15 attachment, the fabric body is woven by the straight tricot structure of spandex Y1, the variable tricot structure of spandex Y2, the weft insertion structure of filament Y3, the weft insertion structure of spandex Y4, and then combined with multiple fancy yarn combs to form an elastic lace fabric with different fancy effects.

[0061] As shown in the Figure 16 attachment, the fabric body is woven by the straight tricot structure of spandex Y1, the variable tricot structure of spandex Y2, and then combined with multiple fancy yarn combs to form an elastic lace fabric with different fancy effects.

[0062] As shown in the Figure 15 attachment, the fabric body is woven by the straight tricot structure of composite yarn Y1, the variable tricot structure of composite yarn Y2, the weft insertion structure of filament Y3, the weft insertion structure of spandex Y4, and then combined with multiple fancy yarn combs to form an elastic lace fabric with different fancy effects.

[0063] As shown in the Figure 16 attachment, the fabric body is woven by the straight tricot structure of composite yarn Y1, the variable tricot structure of composite yarn Y2, and then combined with multiple fancy yarn combs to form an elastic lace fabric with different fancy effects.

[0064] In the specific knitting production of the embodiments of the present invention, the following method is adopted:

[0065] 1. Warping of the yarns used in the fancy knitting machine:

[0066] 1) Warping of filaments and composite yarns:

[0067] Warping machine model: Karl Mayer DS 21 / 30NC-2,

[0068] Let-off method: passive type,

[0069] Warping temperature: 23 °C,

[0070] Warping humidity: 65%,

[0071] Under the above temperature and humidity conditions in the workshop, set the warping process parameters and decide whether to apply oil treatment to the yarn according to the actual situation.

[0072] 2) Warping of spandex:

[0073] Warping machine model: Karl Mayer DSE-H21 / 30NC-2,

[0074] Let-off method: positive type,

[0075] Warping temperature: 24 °C,

[0076] Warping humidity: 78%,

[0077] Under the above temperature and humidity conditions in the workshop, set the warping process parameters.

[0078] 2. Weaving:

[0079] Machine model: FJ83 / 1B.

[0080] Machine gauge: E24.

[0081] 3. Yarn threading method and yarn used:

[0082] Loop comb Y1: full threading, PA6 20D / 34F FD FDY,

[0083] Loop comb Y2: full threading, PA6 20D / 34F FD FDY,

[0084] Laying-in comb Y3: one-in-one-out (Jacquard comb), PA6 40D / 68F FD FDY,

[0085] Laying-in comb Y4: full threading, PU 210D,

[0086] Pattern yarn comb: Select and thread yarn according to the pattern requirements.

[0087] 4. Production process:

[0088] Open-width washing → pre-setting → overflow dyeing → post-finishing.

[0089] It should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A lace fabric with a multi-variable texture, including a fabric body with a texture, characterized in that, The shading includes a shading unit structure, which is formed by alternately knitting the yarns Y1 and Y2 in a loop structure within one pattern repeat in an overlapping and separating manner. The shading unit structure includes a plurality of columns of longitudinal shading units. The longitudinal shading unit includes the current column loop structure and the loop structures of other columns. The loop structures of other columns of the longitudinal shading unit are integrally knitted by offsetting the yarns of the current column loop structure by W stitches. The shading unit structure is an N W x N L loop structure, where N L is the number of rows across which the loops of the yarn are formed during knitting, and N W is the number of offset stitches of the yarn during knitting; The shading unit structure further includes a weft insertion structure layer woven by a fancy yarn comb through weft insertion with yarns Y3 and Y4. The yarn Y4 is an elastane elastic yarn with a linear density of 70 - 560 D; or the yarn Y4 is a filament yarn with a linear density of 30 - 280 D.

2. The lace fabric with multiple variable patterns according to claim 1, characterized in that, When the yarn Y1 is knitted in a straight latch structure, N W1 = 1, N L1 = 1; when the yarn Y2 is knitted in a variable latch structure, 5 ≥ N W2 ≥ 1, and 12 ≥ N L2 ≥ 1, N W1 represents the offset needles of the yarn Y1, N W2 represents the offset needles of the yarn Y2; N L1 represents the number of courses spanned by the loops of the yarn Y1, N L2 represents the number of courses spanned by the loops of the yarn Y2.

3. The lace fabric with multiple variable shades according to claim 1, characterized in that, When the yarn Y1 is knitted in a changing linking structure, 5 ≥ N W1 ≥ 1, and 12 ≥ N L1 ≥ 1; when the yarn Y2 is knitted in a straight linking structure, N W2 = 1, and N L2 = 1, N W1 represents the offset needles of the yarn Y1, N W2 represents the offset needles of the yarn Y2; N L1 represents the number of courses spanned by the loops of the yarn Y1, N L2 represents the number of courses spanned by the loops of the yarn Y2.

4. The lace fabric with multiple variable patterns according to claim 1, characterized in that, When the yarn Y1 is knitted in a changing chain stitch structure, 5 ≥ N W1 ≥ 1, and 12 ≥ N L1 ≥ 1; when the yarn Y2 is knitted in a changing chain stitch structure, 5 ≥ N W2 ≥ 1, and 12 ≥ N L2 ≥ 1, N W1 represents the number of offset stitches of the yarn Y1, N W2 represents the number of offset stitches of the yarn Y2; N L1 represents the number of courses spanned by the loops of the yarn Y1, N L2 represents the number of courses spanned by the loops of the yarn Y2.

5. The lace fabric with multi-variable shading according to any one of claims 1-4, characterized in that, Both the yarns Y1 and Y2 are filament yarns with a linear density of 10 - 150 D; or both the yarns Y1 and Y2 are elastanes with a linear density of 20 - 100 D; or both the yarns Y1 and Y2 are composite yarns composed of filament yarns and elastanes, with a linear density of 20 - 150 D, where the linear density of the filament yarn is 10 - 100 D and the linear density of the elastane is 10 - 70 D.

6. A method for preparing a lace fabric with multi-variable shading according to any one of claims 1-5, characterized in that, The shading unit structure of the fabric body is formed by the yarns Y1 and Y2 knitting alternately in an overlapping and separating manner by forming loop structures within one pattern repeat. After knitting the current longitudinal loop structure, the yarns Y1 and Y2 will horizontally shift W needle counts to the left or right direction and continue knitting to form an N W x N L knitting structure, where N W is the number of needle counts of the yarn shift during knitting, and N L is the number of courses spanned by the loops of the yarn during knitting. Through the loop structures of the yarns Y1 and Y2 and the weft insertion structures of the yarns Y3 and Y4, a lace fabric with a multi-varied shading is knitted by multiple pattern yarn combs.

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