Lace fabric and preparation method and application thereof

Abstract

The invention discloses a preparation method of a lace fabric, which comprises the following steps: carrying out thread hanging and drafting on bottom layer functional yarns to form periodic micro gaps; the bottom-layer functional yarn is subjected to thread hanging drafting, meanwhile, the connecting yarn penetrates, according to the pattern design of the lace fabric, the surface-layer fancy yarn, the bottom-layer functional yarn and the connecting yarn are knitted at the position with patterns through the knitting technology of a large stitch method and a small stitch method, and the lace fabric is prepared; the periodic micro gaps are partially filled with the surface-layer fancy yarn, and the connecting yarn is used for connecting the bottom-layer functional yarn and the surface-layer fancy yarn. According to the preparation method of the lace fabric, the bottom layer functional yarn is subjected to thread hanging and drafting to form periodic micro gaps; and the periodic micro gaps are filled with surface fancy yarns capable of reflecting ultraviolet rays, so that an anti-ultraviolet effect is synergistically generated.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of lace fabrics, and particularly relates to a preparation method of a lace fabric with ultraviolet resistance, a lace fabric prepared by using the preparation method, and application of the lace fabric in clothes or curtains. BACKGROUND

[0002] As a core decorative material for high-end clothing, lace has good air permeability, light and thin texture, and is widely used in products such as underwear, wedding dresses, and curtains. However, its ultraviolet resistance is poor, and ultraviolet radiation can cause the spandex nylon fibers in the lace fabric to age and fade. Moreover, there is an increasing demand for ultraviolet protection in outdoor scenarios such as wedding dresses and sun-protective clothing.

[0003] The improvements in the prior art for lace fabrics mainly include coating processes and multi-layer composite structures. Among them, the coating process destroys the characteristics of lace: traditional sun protection technologies such as nano zinc oxide coating require chemical coating on the surface of lace, resulting in increased fabric thickness, reduced porosity, poor air permeability, and severe damage to the original skin-permeable texture of lace. Moreover, the coating falls off after multiple washes, reducing the sun protection performance.

[0004] Multi-layer composite structures, such as patent CN115142180A, disclose a knitted fabric with heat insulation and sun resistance. Although it can improve sun protection performance, it will flatten the three-dimensional pattern of lace, losing the design aesthetic.

[0005] The disclosure of the above background art is only used to assist in understanding the inventive concept and technical solutions of the present application, and does not necessarily belong to the prior art of the present patent application. In the absence of explicit evidence that the above content was disclosed before the filing date of the present patent application, the above background art should not be used to evaluate the novelty and inventiveness of the present application. SUMMARY

[0006] Therefore, in order to overcome the defects of the prior art, the purpose of the present application is to provide a preparation method of a lace fabric with sun protection function, which effectively improves the ultraviolet resistance while retaining the existing characteristics of the lace fabric.

[0007] In order to achieve the above purpose, the present application adopts the following technical solutions: A preparation method of a lace fabric, comprising the following steps: The bottom layer of functional yarn is hung and stretched to form periodic micro-slits; The connecting yarn is inserted while the bottom functional yarn is subjected to hanging line drafting, and the top pattern yarn is knitted with the bottom functional yarn and the connecting yarn by using the knitting process of separate small needle method at the patterned position according to the design of the lace fabric, so that the lace fabric is prepared, the top pattern yarn is partially filled in the periodic microslit, and the connecting yarn is used to connect the bottom functional yarn and the top pattern yarn.

[0008] According to some preferred embodiments of the present application, the bottom functional yarn is a rare earth-polyamide composite yarn.

[0009] According to some preferred embodiments of the present application, the rare earth is a composite rare earth oxide, and the addition amount is 0.8-1.2wt% of the mass of the functional yarn.

[0010] According to some preferred embodiments of the present application, the composite rare earth oxide is CeO2-La2O3.

[0011] According to some preferred embodiments of the present application, the top pattern yarn is a yarn containing nano-titanium dioxide.

[0012] According to some preferred embodiments of the present application, the nano-titanium dioxide is a microsphere with a particle size of 100-300nm, and the addition amount is 0.2%-0.4% of the mass of the top pattern yarn.

[0013] According to some preferred embodiments of the present application, the drafting ratio of the hanging line drafting is 3.0-3.5:1.

[0014] According to some preferred embodiments of the present application, the periodic microslit is a microslit with a size of 10-30μm between adjacent bottom functional yarns.

[0015] According to some preferred embodiments of the present application, the connecting yarn is a hot-melt spandex covering yarn.

[0016] According to some preferred embodiments of the present application, the hot-melt temperature of the hot-melt spandex covering yarn is 85±5℃.

[0017] According to some preferred embodiments of the present application, the connecting yarn is heated during the knitting process or after the knitting process is completed, so that the connecting yarn is bonded with the bottom functional yarn and the top pattern yarn.

[0018] According to some preferred embodiments of the present application, the tension of the bottom functional yarn, the connecting yarn and the top pattern yarn decreases in turn during knitting. That is, the tension of the bottom functional yarn is the highest to maintain the uniformity of the microslit, the tension of the connecting yarn is the second to balance the bonding strength and the yarn flowability, and the tension of the top pattern yarn is the lowest to prevent needle deformation and ensure the pattern accuracy.

[0019] According to some preferred embodiments of the present application, the tension of the bottom functional yarn is 12 cN ± 2 cN, the tension of the connecting yarn is 10 cN ± 0.5 cN, and the tension of the surface pattern yarn is 8 cN ± 0.5 cN.

[0020] According to some preferred embodiments of the present application, the stitch interval is 3 stitches per 1 stitch and / or 5 stitches per 2 stitches.

[0021] According to some preferred embodiments of the present application, the lace fabric has a surface pattern yarn area and a non-surface pattern yarn area, the surface pattern yarn area has the connecting yarn adhered to the bottom functional yarn and the surface yarn, and the non-surface pattern yarn area has the connecting yarn adhered only to the bottom functional yarn, preventing the structure from being loose.

[0022] Preferably, the surface pattern yarn area is further divided into a normal area and a high exposure area, the high exposure area refers to a part (such as the neckline, shoulder, and sleeve opening) that needs to be protected due to high intensity of ultraviolet radiation. The normal area adopts a stitch interval of 3 stitches per 1 stitch, and the high exposure area adopts a stitch interval of 5 stitches per 2 stitches. The tension of the bottom functional yarn in the normal area is 12 cN ± 1 cN, and the tension of the bottom functional yarn in the high exposure area is increased to 13 cN ± 1 cN, ensuring the uniformity of the micro gaps.

[0023] The present application also provides a lace fabric prepared by the preparation method.

[0024] According to some preferred embodiments of the present application, the lace fabric has an ultraviolet protection factor UPF greater than 50, an ultraviolet protection factor UPF AV greater than 180, an average transmittance T(UVA) AV less than 1.0%, an average transmittance T(UVB) AV less than 0.5%.

[0025] The present application also provides a garment using the lace fabric.

[0026] Compared with the prior art, the present application has the following advantages: the preparation method of the lace fabric of the present application forms periodic micro gaps by drawing the bottom functional yarn, and cooperatively produces an anti-ultraviolet effect by filling the periodic micro gaps with the surface pattern yarn having a reflective ultraviolet function. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the following embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0028] Figure 1 The actual picture of the lace fabric prepared in the embodiment of the present application. DETAILED DESCRIPTION

[0029] In order for those skilled in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0030] The lace fabric with anti-ultraviolet performance of the present application adopts anti-ultraviolet functional yarn with sunscreen function as the bottom layer, lace yarn as the surface layer, and connecting yarn with hot melting performance in the middle. The synergistic design of the pre-stretching micro gap (10-30 μm) of the bottom layer functional yarn and the needle method coverage of the surface layer yarn realizes the comprehensiveness of the anti-ultraviolet function.

[0031] Specifically, the preparation method of the lace fabric with anti-ultraviolet performance of the present application includes the following steps: Step 1, preparation of bottom layer functional yarn The bottom layer functional yarn is a rare earth-nylon composite yarn with a fineness of 35D-45D. The rare earth is a composite rare earth oxide, preferably CeO2-La2O3, and the addition amount is 0.8-1.2wt% of the mass of the functional yarn.

[0032] During preparation, the composite rare earth oxide is melt-blended with nylon 6 base material to realize molecular dispersion and prepare the bottom layer functional yarn.

[0033] Step 2, hanging line drafting of the bottom layer functional yarn and connecting yarn threading Bottom layer functional yarn treatment: the rare earth-nylon yarn with a fineness of 35D-45D is threaded into the guide needle of the warp knitting machine for hanging line drafting to form periodic micro gaps (10-30 μm), and the tension control is 12 cN±1 cN. The stretching expands the ultraviolet absorption surface area, further improving the anti-ultraviolet effect. The gap formed during stretching and knitting is fixed in structure after hot pressing.

[0034] Among them, the drafting ratio of hanging line drafting is 3.0-3.5:1 to realize the micro gap of 10-30 μm between adjacent bottom layer functional yarns. In some embodiments, the preferred drafting ratio is 3.2:1.

[0035] Connecting yarn threading: while treating the bottom layer functional yarn, the connecting yarn is threaded into the middle guide needle, and the tension is set to 10 cN±0.5 cN, which is lower than the tension of the functional yarn to avoid interference with the formation of micro gaps.

[0036] Connecting yarn is 25D-35D hot melt spandex cover yarn, and the hot melt temperature of the hot melt spandex cover yarn is 85±5℃.

[0037] The connecting yarn mainly plays the following two roles: 1) structural adhesion: 25D-35D hot melt spandex cover yarn (hot melt temperature 85±5℃) as the middle layer, through the heating of the hot press roller in the weaving process, the hot melt spandex cover yarn is hot melted and adhered to the bottom functional yarn (35D-45D rare earth-polyamide yarn) and the surface pattern yarn (25D-35D polyester yarn containing nano titanium dioxide), fixing the three-layer structure and preventing interlayer slip (tensile recovery rate > 90%). The connecting yarn is hot melt spandex cover yarn, and the hot melt spandex has elasticity and can withstand the tensile force of non-violent damage in daily use.

[0038] 2) Mechanical support: In the area without surface pattern yarn (such as the hollow part), the connecting yarn adheres to the bottom functional yarn alone to ensure the overall stability of the fabric and reduce the product defect rate.

[0039] Step 3, regional weaving and hot melting coordination According to the design of the lace fabric pattern, the surface pattern yarn, the bottom functional yarn and the connecting yarn are woven synchronously in the area with the pattern by using the weaving process of "separated large and small needles", and the lace fabric is prepared. The weaving machine can be selected as XGM84 / 1 warp knitting machine (28 needles / inch). The weaving area is mainly divided into areas with surface pattern yarn (main body / high exposure area) and areas without surface pattern yarn (periodic micro-slit).

[0040] 1) Area with surface pattern yarn (main body / high exposure area): Weaving with surface pattern yarn: according to the pattern design, "separated large and small needles" (3 needles separated by 1 needle / 5 needles separated by 2 needles) are used to cover the micro-slit (coverage rate ≥ 90%). At the same time of weaving, the connecting yarn is heated synchronously using the hot press roller of the weaving machine (temperature 90±5℃), so that it is adhered to the bottom functional yarn and the surface yarn (adhesion strength > 0.8N / mm 2 , refer to ASTM D903). The tension control of the surface pattern yarn is 8cN±0.5cN.

[0041] 2) Area without surface pattern yarn (periodic micro-slit): The weaving in the area without surface pattern yarn is to use the bottom encryption needle method: "2 needles separated by 0 needles" are used for dense weaving, directly covering the micro-slit (UPF≥50).

[0042] The connecting yarn in the area without surface pattern yarn is adhered independently, only adhering to the bottom functional yarn to prevent the structure from being loose.

[0043] That is, in the area with surface pattern yarn: bottom functional yarn → intermediate connecting yarn → surface pattern yarn, a "sandwich" structure is formed by hot pressing; in the area without surface pattern yarn: bottom functional yarn → intermediate connecting yarn, a micro gap is covered by the tight knitting method. Therefore, steps 2 and 3 are performed synchronously, and according to the design of the pattern, the bottom functional yarn and the connecting yarn in the area without surface pattern yarn are knitted synchronously, and the surface pattern yarn and the bottom functional yarn and the connecting yarn in the area with surface pattern yarn are knitted synchronously.

[0044] Using the knitting process of connecting yarn and surface pattern yarn and adopting the method of large and small needles, a lace fabric is prepared, and the surface pattern yarn part is filled in the periodic micro gap. The yarns are interlaced in each layer during weaving, achieving three-dimensional structure shielding and filling, covering the ultraviolet projection path, and improving the ultraviolet resistance effect.

[0045] The surface pattern yarn is a yarn containing nano titanium dioxide. The nano titanium dioxide is a microsphere with a particle size of 100-300 nm, and the addition amount is 0.2%-0.4% of the mass of the surface pattern yarn. It is used to reflect ultraviolet rays and form a synergistic ultraviolet resistance effect with the bottom yarn.

[0046] According to the design requirements of the pattern, for the stretched bottom functional yarn, the gap is supplemented. Specifically, by using the "large and small needle method" (3 needles apart 1 needle or 5 needles apart 2 needles) in the gap area, the ultraviolet transmission path is covered. Preferably, the main body area without special requirements adopts "3 needles apart 1 needle", the high exposure area adopts "5 needles apart 2 needles" to increase the tightness, the coverage rate of the surface pattern yarn is ≥95%, and the UPF value is ≥50. The high exposure area refers to the parts (such as the neckline, shoulders, and cuffs) that need to be protected due to high ultraviolet radiation intensity. Tension adjustment: the tension of the functional yarn in the high exposure area is increased to 13 cN±1 cN, ensuring the uniformity of the micro gap.

[0047] At the same time, during knitting, the bottom functional yarn in the bottom layer, the connecting yarn in the middle layer, and the surface pattern yarn in the surface layer adopt differential tension control to ensure the uniformity of the gap. The tension of the bottom functional yarn, the connecting yarn, and the surface pattern yarn decreases in turn. That is, the tension of the bottom functional yarn (12 cN±1 cN) is the highest, maintaining the uniformity of the micro gap; the tension of the connecting yarn (10 cN±0.5 cN) is the second, balancing the adhesion strength and the yarn flowability, and avoiding interference with the formation of the micro gap and preventing excessive stretching before hot melting from causing structural deformation; the tension of the surface pattern yarn (8 cN±0.5 cN) is the smallest, preventing needle deformation and ensuring pattern accuracy. By controlling the tension difference, the yarn flowability is moderate during hot melting and bonding, and the bonding interface is uniform.

[0048] The lace fabric prepared by the above preparation method has an ultraviolet protection factor UPF greater than 50, an ultraviolet protection factor UPF AV greater than 180, and an average transmittance T(UVA) AVLess than 1.0%, average transmittance T (UVB) AV Less than 0.5%. And the lacy fabric in the present application may cause the fiber to become fluffy, the cloth surface to shrink, and the ultraviolet protection factor UPF AV Increased, greater than 450.

[0049] The above lacy fabric can be applied to products such as clothing and curtains.

[0050] Example 1 The preparation method of the lacy fabric with anti-ultraviolet performance in this embodiment includes the following steps: Step 1, preparing the bottom functional yarn The bottom functional yarn is a rare earth-polyamide composite yarn with a fineness of 40D. The rare earth is a composite rare earth oxide, preferably CeO2-La2O3, and the addition amount is 1.0wt% of the mass of the functional yarn.

[0051] During preparation, the composite rare earth oxide is melt-blended with polyamide 6 base material to achieve molecular dispersion through double screw extrusion and prepare the bottom functional yarn.

[0052] Step 2, thread stretching and connecting yarn threading of the bottom functional yarn The bottom functional yarn is stretched to form periodic micro-slits, and the tension is controlled at 12cN±1cN. The stretching ratio of the thread stretching is 3.2:1 to achieve a micro-slit of 20μm between adjacent bottom functional yarns. The slit is enlarged after stretching to increase the ultraviolet absorption surface area, further improving the anti-ultraviolet effect.

[0053] At the same time, the connecting yarn is threaded into the middle guide needle, and the tension is set to 10cN±0.5cN, which is lower than the functional yarn tension to avoid interference with the formation of micro-slits. The connecting yarn is a hot melt spandex covered yarn. The hot melt temperature of the hot melt spandex covered yarn is 85±5℃, which can bond the bottom functional yarn and the surface pattern yarn after hot melting.

[0054] Step 3, regional weaving and hot melting The weaving process of 3 needles apart 1 needle or 5 needles apart 2 needles is adopted to prepare the lacy fabric, and the surface pattern yarn is filled in the periodic micro-slits.

[0055] The surface pattern yarn is a yarn containing nano-titanium dioxide. The nano-titanium dioxide is a microsphere with a particle size of 200nm, and the addition amount is 0.3% of the mass of the surface pattern yarn. It is used to reflect ultraviolet light and form a synergistic anti-ultraviolet effect with the bottom yarn.

[0056] That is, according to the design requirements of the pattern, the gaps of the stretched bottom functional yarns are filled. Specifically, the gaps are covered by knitting in the gap area through the "separation of large and small needles" (3 needles separate 1 needle, 5 needles separate 2 needles), covering the ultraviolet transmission path. Preferably, the main area without special requirements adopts "3 needles separate 1 needle", and the high exposure area (such as the neckline) adopts "5 needles separate 2 needles" encryption.

[0057] Example 2 The difference between this example and Example 1 is that in the preparation method of the lace fabric with anti-ultraviolet performance of this example, the addition amount of CeO2-La2O3 is 0.8wt% of the mass of the functional yarn; the draft ratio of the thread hanging draft is 3.0:1 to realize a micro gap of 10pm between adjacent bottom functional yarns; and the nano titanium dioxide in the surface pattern yarn is a microsphere with a particle size of 300nm, and the addition amount is 0.2% of the mass of the surface pattern yarn.

[0058] Example 3 The difference between this example and Example 1 is that in the preparation method of the lace fabric with anti-ultraviolet performance of this example, the addition amount of CeO2-La2O3 is 1.2wt% of the mass of the functional yarn; the draft ratio of the thread hanging draft is 3.5:1 to realize a micro gap of 30pm between adjacent bottom functional yarns; and the nano titanium dioxide in the surface pattern yarn is a microsphere with a particle size of 100nm, and the addition amount is 0.4% of the mass of the surface pattern yarn.

[0059] Comparative Example 1 The difference between this comparative example and Example 1 is that in the preparation method of the lace fabric with anti-ultraviolet performance of this comparative example, the bottom functional yarns and the connecting yarns are directly knitted with the surface pattern yarn, and there is no step of thread hanging draft in step 2 of Example 1, i.e. the bottom functional yarns do not have periodic micro gaps before knitting. The remaining steps and parameters are basically the same as those of Example 1.

[0060] Comparative Example 2 The difference between this comparative example and Example 1 is that in the preparation method of the lace fabric with anti-ultraviolet performance of this comparative example, the bottom yarn is a common nylon yarn, which is not the bottom functional yarn in Example 1. The remaining steps and parameters are basically the same as those of Example 1.

[0061] Comparative Example 3 The difference between this comparative example and Example 1 is that in the preparation method of the lace fabric with anti-ultraviolet performance of this comparative example, no nano titanium dioxide yarn is added to the surface pattern yarn, and the remaining steps and parameters are basically the same as those of Example 1.

[0062] Comparative Example 4 The difference between the present comparative example and example 1 is that, in the preparation method of the lace fabric with anti-ultraviolet property of the present comparative example, the surface yarn and the bottom yarn are both ordinary yarns, and the remaining steps and parameters are basically the same as those of example 1.

[0063] Detection and results The lace fabrics prepared in the above examples and comparative examples are detected for relevant parameters, wherein the UPF, UPF AV , T(UVA) AV , T(UVB) AV are tested according to (Anti-ultraviolet property GB / T 18830-2009), and the antibacterial property is tested according to (Antibacterial FZ / T 73023-2006 AAA level). The results are shown in Table 1 below. Table 1 Test results of examples and comparative examples The results in Table 1 show that the results of example 1 and comparative example 1 show that the use of a method of existing periodic microslits during weaving of the sunscreen functional bottom yarn can directly greatly reduce the sunscreen effect; the results of example 1 and comparative example 2 show that the use of a method of existing periodic microslits before weaving, but the bottom yarn is an ordinary yarn, can directly greatly reduce the sunscreen effect; the results of example 1 and comparative example 3 show that the use of a method of existing periodic microslits before weaving, and the bottom yarn is a sunscreen functional yarn, but the surface yarn is an ordinary yarn, can obviously reduce the sunscreen effect. The results of example 1 and comparative example 4 show that when the surface yarn and the bottom yarn are both ordinary yarns, no sunscreen effect is obtained.

[0064] Compared with the prior art, the advantages of the present application are as follows: 1. The photocatalytic properties of rare earth elements lead to electron transition, combined with the weaving structure and yarn design, UPF≥50, T(UVA) AV <1% and the antibacterial rate is >99% (to E. coli), avoiding the risk of heavy metal residue of silver ions; compared with the traditional coating process, the present application is more breathable, has better stretchability, maintains a light transmittance of ≥80%, significantly improves the heat shielding performance, and has a color difference ΔE<1.5 (in line with the GB / T 3921-2008 standard).

[0065] 2. The microslits after stretching expand the ultraviolet absorption surface area. The microslits after stretching make the UPF value increase to 50+, T(UVA) AV reaching the GB / T 18830-2009 standard.

[0066] 3. Synergistic mechanism of antibacterial-sunscreen: CeO2 in rare earth yarn generates reactive oxygen species (ROS) through photocatalytic reaction, which destroys the bacterial cell membrane (antibacterial rate > 99%), and absorbs 290-400 nm ultraviolet rays (UPF≥50); the surface of the surface pattern yarn is preferably loaded with 0.3% nano titanium dioxide (particle size 200 nm), which reflects ultraviolet rays and forms a "absorption-reflection" double protection with the rare earth yarn, and the UPF value reaches ≥50.

[0067] The above examples are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application, any equivalent changes or modifications made according to the spirit and essence of the present application should be covered within the protection scope of the present application.

[0068] The endpoints of the ranges and any values disclosed herein are not limited to the precise values recited as the exact dimensions are not considered critical for the present application. The endpoints of the ranges and any values are provided as a separate point or as a range between adjacent values. The range of numerical values includes every number between the range limits regardless of whether specific numerical values are explicitly recited. The endpoints of the ranges of values (as well as the values themselves) can be combined with one or more of the other ranges or values as are broadly contemplated to receive within the scope of the present application, e.g., with endpoints of a first range and a second range or a single value.

Claims

1. A method of making a lace fabric, characterized by, The method comprises the following steps: threading and drafting the bottom functional yarn to form periodic micro-slits; threading and drafting the bottom functional yarn to form periodic micro-slits; 2. The production method according to claim 1, characterized by, The bottom functional yarn is a rare earth-polyamide composite yarn.

3. The preparation method according to claim 2, characterized in that, The rare earth is a composite rare earth oxide, and the addition amount is 0.8-1.2wt% of the mass of the functional yarn.

4. The production method according to claim 3, characterized by, The composite rare earth oxide is CeO2-La2O3.

5. The preparation method according to claim 1, characterized in that, The surface layer yarn is a yarn containing nano-titanium dioxide.

6. The production method according to claim 5, wherein The nano-titanium dioxide is a microsphere with a particle size of 100-300nm, and the addition amount is 0.2%-0.4% of the mass of the surface layer yarn.

7. The preparation method according to claim 1, characterized in that, The drafting ratio of the threading and drafting is 3.0-3.5:

1.

8. The method of claim 1, wherein, The periodic micro-slits are micro-slits with a width of 10-30μm between adjacent bottom functional yarns.

9. The method of claim 1, wherein, The connecting yarn is a hot-melt spandex covering yarn.

10. The method of claim 9, wherein, The hot-melt temperature of the hot-melt spandex covering yarn is 85±5℃.

11. The method of claim 10, wherein, The connecting yarn is heated during or after the knitting process to make the connecting yarn adhere to the bottom functional yarn and the surface layer yarn.

12. The method of claim 10, wherein, During knitting, the tension of the bottom functional yarn, the connecting yarn and the surface layer yarn decreases in turn.

13. The preparation method according to claim 10, characterized in that, The tension of the bottom functional yarn is 12cN±2cN, the tension of the connecting yarn is 10cN±0.5cN, and the tension of the surface layer yarn is 8cN±0.5cN.

14. The method of claim 1, wherein, The 3-needle separation 1-needle and / or 5-needle separation 2-needle method is used.

15. A lace fabric prepared by the preparation method of any one of claims 1-14.

16. The lace fabric of claim 1, wherein, The lacy fabric has an ultraviolet protection factor UPF greater than 50, an ultraviolet protection factor UPF AV greater than 180, a transmittance average value T(UVA) AV less than 1.0%, a transmittance average value T(UVB) AV less than 0.5%.

17. A garment or curtain using the lace fabric of claim 15 or 16.

Images