Anti-ultraviolet and comfortable balance type real silk and chinlon interwoven fabric, preparation method and sunscreen clothes

Abstract

The invention relates to the technical field of functional textile fabrics, in particular to an anti-ultraviolet and comfortable balance type real silk and chinlon interwoven fabric, a preparation method and sunscreen clothes. According to the real silk and chinlon interwoven fabric, anti-ultraviolet composite master batches are prepared, and then spinning is conducted on the anti-ultraviolet composite master batches and chinlon slices. In addition, in the preparation process of the fabric, through the design of a fabric weave structure, chinlon can protect the real silk, the overall ultraviolet resistance is improved, and meanwhile the service life of the real silk is guaranteed. According to the method, the core problems that a traditional sunscreen fabric is opposite in protective property and comfort, single in function, unfriendly to the environment and the like are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of functional textile fabrics, and in particular to an anti-ultraviolet and comfortable balanced silk and nylon interwoven fabric, a preparation method and sun-protective clothing. Background Art

[0002] With the intensification of global climate change and ozone layer depletion, the threat of ultraviolet radiation to human health is becoming increasingly significant. Studies have shown that excessive exposure to ultraviolet light not only causes photoaging and pigmentation of the skin, but can also induce serious diseases such as skin cancer. Therefore, sun-protective textiles that combine protection and comfort have become an urgent market demand. In recent years, the market for sun-protective clothing has continued to expand, with high-end fabrics that are lightweight, breathable, and have excellent UV resistance being highly sought after. However, silk, as a natural protein fiber, is known for its skin-friendliness and breathability, but due to its loose fiber structure and weak UV absorption capacity, it cannot directly meet the high demand for UV protection. Therefore, it is urgently needed to achieve functional modification through technical means.

[0003] Traditional UV-resistant finishing technologies primarily achieve protection through the addition of chemical UV absorbers (such as benzotriazoles) or physical shielding agents (such as titanium dioxide and zinc oxide nanoparticles). For example, some patents combine titanium dioxide with polyester materials through a coating process to form a double-layer protective structure. However, this method can easily lead to fabric stiffness and reduced breathability, making it difficult to meet the comfort requirements of lightweight fabrics such as silk. Furthermore, chemical synthetic finishing agents pose potential biotoxicity and environmental residue risks, which contradict the natural and environmentally friendly properties of silk.

[0004] In recent years, natural plant extracts (such as Litsea cubeba and Sanguisorba officinalis) have been explored for use in UV-resistant finishes due to their green and safe properties. For example, Zhejiang Sci-Tech University has used Sanguisorba officinalis extract in combination with a mordant to treat silk fabric, achieving a UPF value of 82.41. However, this requires a multi-step mordant process, resulting in low efficiency and limited stability and durability of the plant ingredients. Another patent addresses the issue of waste resource utilization by using extracts from Litsea cubeba residue. However, the process requires high temperatures and strong alkaline conditions (98°C, sodium hydroxide solution), which could damage the mechanical properties of silk fibers and does not involve combining with other fibers to enhance overall performance.

[0005] To balance functionality and comfort, the industry has experimented with interweaving silk with synthetic fibers (such as nylon and polyester). Nylon, due to its high strength, abrasion resistance, and ease of functionalization, is often used to enhance fabric performance. However, existing technologies often focus on a single function (such as UV protection or moisture absorption and quick drying), lacking systematic research on the synergistic effects of the two. For example, a patent filed by a Suzhou company improves breathability by combining cooling fibers with moisture-absorbing yarns, but it fails to address the uneven distribution of the finishing agent at the silk-nylon interwoven interface due to polarity differences. Furthermore, differences in dyeing properties between silk and nylon can lead to reduced color fastness, further restricting their commercial application.

[0006] Consumer demand for sun-protective clothing has shifted from single-purpose protection to integrated, multifunctional features, including lightweight, breathable, washable, durable, skin-friendly, and environmentally friendly features. For example, some branded sun-protective clothing uses intelligent color-changing technology to reflect UV intensity, but its base material is still primarily polyester, failing to meet the high-end market's preference for natural materials. While silk fabric offers natural advantages, existing technology struggles to achieve a UPF (Ultraviolet Protection Factor) exceeding 50 while maintaining its inherent soft drape. Market research shows that over 60% of consumers are dissatisfied with the breathability of sun-protective clothing, especially in hot and humid environments, where the stuffiness of synthetic fabrics significantly impacts the wearing experience. Patent application number 202311037813.3 discloses a heat-shielding sun-protective clothing capable of monitoring UV intensity and its preparation method. The clothing comprises a blended yarn layer and a polyester layer; the garment body is a double-layer fabric with an inner polyester layer and an outer blended yarn layer. Similar to the above application, it has the following deficiencies: (1) the body and sleeves are sewn together, and there are no openings on the shoulders and back, resulting in poor breathability; (2) the double-layer fabric used has poor breathability and moisture permeability; (3) there is no personalized design with a luminous effect.

[0007] To sum up, developing a silk fabric and sun-protective clothing with balanced UV resistance and comfort not only improves the UV resistance level of silk fabric, but also achieves a dynamic balance between protective performance and wearing comfort, thereby meeting the diversified needs of the high-end sun-protective clothing market. Summary of the Invention

[0008] The present invention aims to address the core issues of traditional silk fabrics and clothing, such as insufficient sun protection and susceptibility to yellowing and aging under UV exposure, as well as the conflicting protective and comfort characteristics of traditional pure fiber sunscreen fabrics and their single functionality. The present invention provides a silk-nylon interwoven fabric that balances UV resistance and comfort, and a corresponding preparation method. Furthermore, a novel method for preparing sunscreen clothing based on this fabric is provided.

[0009] Specifically, the present invention adopts the following technical solutions: A silk-nylon interwoven fabric with balanced ultraviolet resistance and comfort, wherein the silk-nylon interwoven fabric is prepared according to the following preparation method: Step 1, preparing a composite masterbatch with UV resistance using nano-titanium dioxide and nylon chips; Step 2, spinning nylon filaments, the composite masterbatch prepared in step 1 and nylon chips are melted at high temperature and uniformly mixed in a ratio of 10:90-15:85, extruded through a screw extruder, formed into a thin stream using a shaped spinneret, and subjected to a spinning process including blow cooling, technical oiling, stretching and shaping, and winding and burning to obtain functional FDY nylon filaments with a special cross-section; Step 3, fabric preparation, using mulberry silk as warp yarn and the nylon filament yarn with UV resistance prepared in step 2 as weft yarn, and then interweaving them through a weaving process to obtain a silk nylon interwoven fabric; wherein the mulberry silk warp yarn density is 800-1100 yarns / 10cm, the single yarn fineness is 20D-40D, the nylon silk weft yarn density is 400-800 yarns / 10cm, the single yarn fineness is 20D-60D, and the F number of the single yarn is greater than or equal to 24; when preparing the fabric, the fabric structure adopts one or more of plain weave, twill weave, satin weave, openwork weave, weft-weight weave, and double-layer weave.

[0010] Furthermore, in step 3, when the twill weave and the satin weave are formed, the weft twill and the weft satin structures are adopted, so that the nylon yarn floats on the surface of the fabric and the silk yarn is on the bottom layer of the fabric.

[0011] Furthermore, in step 3, when the weft is heavy or double-layer, the weft yarn configuration mode is switched through the shuttle design control according to the different balance requirements between UV protection and comfort; the weft yarn configuration mode includes: both the surface weft and the inner weft yarns are made of functional nylon yarn, or the surface weft is made of functional nylon yarn and the inner weft is made of mulberry silk.

[0012] Furthermore, the preparation method of the composite masterbatch in step 1 is as follows: Step 1, preparation of pre-dispersion liquid: plasma-activated nano-TiO2, UV-328 dissolved in ethanol, and a solution of hydroxylated graphene quantum dots dispersed in DMF were mixed, 5 wt% of sodium polyacrylate was added as a dispersant, and ultrasonic treatment was performed for 1 hour to form a pre-dispersion liquid; By weight percentage: nano-TiO2 is 73-77%, UV-328 is 22-25%, hydroxylated graphene quantum dots is 0.3-0.8%, and sodium polyacrylate is 1.5-2.5%; Step 2: evaporating the solvent by distilling the pre-dispersed liquid under reduced pressure at 60° C. to remove ethanol / DMF to obtain a composite powder; Step 3, masterbatch preparation, the composite powder and nylon chips are melt-blended in a ratio of 1-2:9 through a twin-screw extruder, the blending temperature adopts a gradient temperature, specifically 220℃-235℃-230℃, and after pelletizing, vacuum drying at 60-80℃ for more than 4h to obtain the composite masterbatch.

[0013] In this case, plasma pretreatment of nano-TiO2 (e.g., at a power of 50-100 W and a time of 5 min) was used to improve the dispersion; Nano-TiO2 mainly scatters / reflects ultraviolet rays (especially UVB / UVA-II bands), while benzotriazole (UV-328) absorbs ultraviolet rays (especially UVA-I band, 340-400nm) through its molecular structure; the combination of the two can cover a wider ultraviolet spectrum (280-400nm), and TiO2 can reduce the photodegradation of UV-328.

[0014] Hydroxylated graphene quantum dots absorb the entire UV wavelength range (200-400nm) through the quantum confinement effect, particularly filling the weaker range between TiO2 and UV-328. Furthermore, nano-TiO2 and hydroxylated graphene quantum dots can form a heterojunction, enhancing UV absorption efficiency.

[0015] Furthermore, the particle size of the nano titanium dioxide powder in step 1 is 100-350 nm.

[0016] Furthermore, the nylon slices in step 1 and step 2 are semi-dull or fully-dull nylon 6 or nylon 66.

[0017] Furthermore, the spinneret holes of the spinneret in step 2 are in a cross shape, a Y shape, a dumbbell shape or the like.

[0018] Furthermore, in step 2, the spinning speed is 2700-3500 n / min, the draft ratio is 1.1-1.3, the cooling air temperature is 15-20° C., the relative humidity is 70%-90%, and the wind speed is 0.4-0.7 m / s.

[0019] A method for preparing sun-protective clothing using the silk and nylon interwoven fabric comprises the following steps: (1) Design of sun-protective clothing styles: First, design the style of the clothing based on ergonomics; then, determine the sun protection area of ​​the clothing based on the sun protection needs; finally, design the clothing structure based on the style and sun protection area; (2) Sun protection clothing design drawings: According to the style, size and sun protection area of ​​sun protection clothing, the CAD layout drawings of each clothing piece sample are integrated into the woven jacquard fabric design drawings; According to the different sun protection areas and the requirements of sun protection levels, the corresponding weave structure, shuttle settings and weft density are set, and the sun protection clothing pieces and fabrics are integrated into the design to obtain the pattern card file of the jacquard fabric; (3) Fabric weaving: using mulberry silk as the warp yarn and UV-resistant functional nylon filament yarn as the weft yarn, using a large jacquard loom, and weaving a one-piece fabric according to the pattern file design obtained in step (2); (4) Cutting and sewing garment pieces: Cutting garment pieces from different parts of the jacquard fabric made of silk and nylon, along the boundaries of the garment pieces shown by the jacquard, and using these garment pieces to make the prototype of the sun-protective clothing; (5) Pattern effect production: using luminous yarn and embroidery technology to design patterns with luminous effects on the front chest, back, sleeves, seams and other areas of the body; (6) Sun protection monitoring production: Apply ultraviolet sensitive color-changing paint to the local area of ​​the large sleeves for coating design or collage ultraviolet color-changing fabrics to realize the ultraviolet monitoring function of the sun protection clothing.

[0020] Furthermore, in step (2), different weave structures are designed according to the different sun protection levels of the sun protection areas. For high sun protection areas, a heavy weft weave structure is adopted, and the weft yarns are made of nylon yarn with full sun protection function, and the weft yarn density is greater than or equal to 480 yarns / 10 cm; for medium sun protection areas, a weft surface weave structure is adopted, and the weft yarn density is in the range of 400~480 yarns / 10 cm; for low sun protection areas, an open-hole weave structure is adopted, and the weft yarn density is in the range of 400~480 yarns / 10 cm.

[0021] Compared with the prior art, the present invention has the following beneficial effects: Through multi-dimensional collaborative innovation of fiber materials, fabrics, and clothing, this invention solves the core problems of traditional sunscreen fabrics, such as the conflict between protection and comfort, single function, and environmental unfriendliness. Specific advantages are as follows: (1) Through the composite interweaving of silk and functional modified nylon (special-shaped cross-section design + component optimization), combined with jacquard weaving technology to control the porosity of the fabric, the sun protection level can be customized, so that the UPF value of the fabric accurately covers the range of 15-80, and the air permeability is improved simultaneously. This breaks through the contradiction between the insufficient UPF value of silk fabrics and the significant stuffiness of synthetic fibers in existing technologies. At a high protection level of UPF ≥ 50, the natural soft touch and breathability of silk are still maintained, meeting the comfort needs of long-term outdoor activities; (2) In a single-layer fabric structure, the weft weave (weft twill and weft satin) is used to precisely cover the surface with anti-ultraviolet nylon, while the mulberry silk is concentrated in the bottom layer, forming a "hard sun protection + soft touch" composite function; in a heavy weft or double-layer fabric structure, the anti-ultraviolet performance and comfort performance can be adjusted by switching between the two modes of surface weft full-function nylon or surface weft nylon + lining weft mulberry silk; (3) Using jacquard design methods, different fabric structures are designed for different areas of the garment pattern, achieving on-demand distribution and integrated design of sun protection level and breathability in the same fabric; (4) With the high-density silk warp yarn layer as the support and combined with fine-denier special-shaped nylon yarn, the UV resistance and moisture conductivity are improved simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The present invention is a schematic structural diagram of a sun-protective garment prepared by the method of the present invention.

[0023] In the figure: 1 is the hood, 2 is the brim, 3 is the shoulder of the body, 4 is the back of the body, 5 is the large sleeve, and these areas are all made of fabric A; the medium protection area includes: 6 is the front of the body, 7 is the back hem of the body, and these areas are all made of fabric B; the low protection area includes: 8 is the waist and sides of the body, 9 is the small sleeve; these areas are all made of fabric C; in addition, 10 is the luminous pattern, 11 is the anti-UV monitoring print, 12 is the head opening, 13 is the shoulder opening, and 14 is the back opening. DETAILED DESCRIPTION

[0024] The representative embodiments shown in the accompanying drawings will now be further detailed. It should be understood that the following description is not intended to limit the embodiments to a preferred embodiment. Instead, it is intended to encompass alternatives, modifications, and equivalents that are within the spirit and scope of the embodiments defined by the appended claims.

[0025] The present invention first provides a silk-nylon interwoven fabric with balanced ultraviolet resistance and comfort, wherein the silk-nylon interwoven fabric is prepared according to the following preparation method: Step 1, preparing a composite masterbatch with UV resistance using nano-titanium dioxide and nylon chips; Step 2, spinning nylon filaments, the composite masterbatch prepared in step 1 and nylon chips are melted at high temperature and uniformly mixed in a ratio of 10:90-15:85, extruded through a screw extruder, formed into a thin stream using a shaped spinneret, and subjected to a spinning process including blow cooling, technical oiling, stretching and shaping, and winding and burning to obtain functional FDY nylon filaments with a special cross-section; Step 3, fabric preparation, using mulberry silk as warp yarn and the nylon filament yarn with UV resistance prepared in step 2 as weft yarn, and then interweaving them through a weaving process to obtain a silk nylon interwoven fabric; wherein the mulberry silk warp yarn density is 800-1100 yarns / 10cm, the single yarn fineness is 20D-40D, the nylon silk weft yarn density is 400-800 yarns / 10cm, the single yarn fineness is 20D-60D, and the F number of the single yarn is greater than or equal to 24; when preparing the fabric, the fabric structure adopts one or more of plain weave, twill weave, satin weave, openwork weave, weft-weight weave, and double-layer weave.

[0026] In step 3, when twill and satin weaves are used, weft twill and weft satin structures are used, so that the nylon yarn floats on the surface of the fabric and the silk yarn is on the bottom layer of the fabric; when weft-heavy weave and double-layer weave are used, the weft yarn configuration mode is switched through shuttle design control according to different balance requirements between UV protection and comfort; the weft yarn configuration mode includes: both the surface weft and the lining weft yarns are made of functional nylon yarn, or the surface weft is made of functional nylon yarn and the lining weft is made of mulberry silk.

[0027] The preparation method of the composite masterbatch in step 1 is as follows: Step 1, preparation of pre-dispersion liquid: plasma-activated nano-TiO2, UV-328 dissolved in ethanol, and a solution of hydroxylated graphene quantum dots dispersed in DMF were mixed, 5 wt% of sodium polyacrylate was added as a dispersant, and ultrasonic treatment was performed for 1 hour to form a pre-dispersion liquid; By weight percentage: nano-TiO2 is 73-77%, UV-328 is 20-25%, hydroxylated graphene quantum dots is 0.3-0.8%, and sodium polyacrylate is 1.5-2.5%; Step 2: evaporating the solvent by distilling the pre-dispersed liquid under reduced pressure at 60° C. to remove ethanol / DMF to obtain a composite powder; Step 3, masterbatch preparation, the composite powder and nylon chips are melt-blended in a ratio of 1-2:9 through a twin-screw extruder, the blending temperature adopts a gradient temperature, specifically 220℃-235℃-230℃, and after pelletizing, vacuum drying at 60-80℃ for more than 4h to obtain the composite masterbatch.

[0028] The particle size of the nano titanium dioxide powder in step 1 is 100-350 nm.

[0029] It is characterized in that: the nylon slices in step 1 and step 2 are semi-dull or fully dull nylon 6 or nylon 66.

[0030] The spinneret holes of the spinneret in step 2 are in a cross shape, a Y shape, a dumbbell shape or the like.

[0031] In the step 2, the spinning speed is 2700-3500 n / min, the draft ratio is 1.1-1.3, the cooling air temperature is 15-20° C., the relative humidity is 70%-90%, and the wind speed is 0.4-0.7 m / s.

[0032] The above is the prepared silk nylon interwoven fabric.

[0033] Based on the preparation of the above fabrics, the present invention also provides a new method for preparing sun-protective clothing, which specifically includes the following steps: (1) Design of sun-protective clothing styles: First, design the style of the clothing based on ergonomics; then, determine the sun protection area of ​​the clothing based on the sun protection needs; finally, design the clothing structure based on the style and sun protection area; (2) Sun protection clothing design drawings: According to the style, size and sun protection area of ​​sun protection clothing, the CAD layout drawings of each clothing piece sample are integrated into the woven jacquard fabric design drawings; According to the different sun protection areas and the requirements of sun protection levels, the corresponding weave structure, shuttle settings and weft density are set, and the sun protection clothing pieces and fabrics are integrated into the design to obtain the pattern card file of the jacquard fabric; Different weave structures are designed according to the different sun protection levels of the sun protection areas. For high sun protection areas, a heavy weft weave structure is used, and the weft yarns are made of fully sun-protective nylon yarns with a weft yarn density greater than or equal to 480 yarns / 10 cm; for medium sun protection areas, a weft-surface weave structure is used, with a weft yarn density between 400 and 480 yarns / 10 cm; for low sun protection areas, an open-hole weave structure is used, with a weft yarn density between 400 and 480 yarns / 10 cm. (3) Fabric weaving: using mulberry silk as the warp yarn and UV-resistant functional nylon filament yarn as the weft yarn, using a large jacquard loom, and weaving a one-piece fabric according to the pattern file design obtained in step (2); (4) Cutting and sewing garment pieces: Cutting garment pieces from different parts of the jacquard fabric made of silk and nylon, along the boundaries of the garment pieces shown by the jacquard, and using these garment pieces to make the prototype of the sun-protective clothing; (5) Pattern effect production: using luminous yarn and embroidery technology to design patterns with luminous effects on the front chest, back, sleeves, seams and other areas of the body; (6) Sun protection monitoring production: Apply ultraviolet sensitive color-changing paint to the local area of ​​the large sleeves for coating design or collage ultraviolet color-changing fabrics to realize the ultraviolet monitoring function of the sun protection clothing.

[0034] In this case, the specific operation process of using plasma pretreatment to improve the dispersibility of nano-titanium dioxide is as follows: Use a radio frequency (RF) or dielectric barrier discharge (DBD) plasma generator with an adjustable power range of 50-100W and a frequency of 13.56MHz (common in industry). It should be designed for vacuum or atmospheric pressure and equipped with a gas flow control system (such as Ar, O2, or N2 as the working gas). A high-temperature resistant crucible or quartz tray is used to hold the nano-TiO2 powder. The preprocessing steps include: Powder pretreatment: the nano-TiO2 powder was dried in an oven at 80 °C for 2 hours to remove adsorbed water, and then sieved (400 mesh) to avoid the presence of agglomerates; Plasma treatment, vacuuming: Pump the reaction chamber to basic vacuum (10 -2 ~10 -3 Pa); introduce working gas: for example, argon (Ar) at a flow rate of 20-50 sccm, maintaining a chamber pressure of 10-50 Pa. Adjust the RF power to 50-100 W. Maintain plasma discharge for 5 minutes, during which time confirm that the glow discharge is stable (uniform purple / blue plasma) through the observation window.

[0035] After post-processing, after turning off the plasma, continue to flow Ar gas for 5 minutes to cool, take out the powder and seal it for storage to avoid secondary moisture absorption.

[0036] Example 1: A silk-nylon interwoven fabric with balanced UV resistance and comfort, the method is as follows: Step 1, preparing a composite masterbatch with UV resistance using nano-titanium dioxide and nylon chips; The composite masterbatch is made by mixing nylon chips and composite powder: The composite powder is composed of 73% nano-TiO2, 25% UV-328, 0.3% hydroxylated graphene quantum dots, and 1.7% sodium polyacrylate by weight. The ratio of nylon chips to composite powder is 9:1; Step 2, spinning nylon filaments, the composite masterbatch prepared in step 1 and the nylon chips are melted at high temperature and uniformly mixed in a ratio of 10:90-15:85, extruded through a screw extruder, formed into a thin stream using a cross-shaped special-shaped spinneret, and subjected to a spinning process including blow cooling, technical oiling, stretching and shaping, and winding and burning to obtain functional FDY nylon filaments with special cross-sections; Step 3, fabric preparation, using mulberry silk as warp yarn and the nylon filament yarn with UV resistance prepared in step 2 as weft yarn, and then interweaving them through a weaving process to obtain a silk nylon interwoven fabric; wherein the mulberry silk warp yarn density is 800-1100 yarns / 10cm, the single yarn fineness is 20D-40D, the nylon silk weft yarn density is 400-800 yarns / 10cm, the single yarn fineness is 20D-60D, and the F number of the single yarn is greater than or equal to 24; the spinning speed is 2700-3500n / min, the draft ratio is 1.1-1.3, the cooling air temperature is 15-20°C, the relative humidity is 70%-90%, and the wind speed is 0.4-0.7m / s. When preparing the fabric, the fabric structure is plain weave, twill weave, satin weave, openwork weave, weft-heavy weave, and double-layer weave; when twill weave and satin weave are used, weft twill and weft satin structures are used to make the nylon yarn float on the surface of the fabric and the silk yarn is on the bottom layer of the fabric; when weft-heavy weave and double-layer weave are used, the weft yarn configuration mode is switched through the shuttle design control according to the different balance requirements of anti-ultraviolet sun protection and comfort; the weft yarn configuration mode includes: both the surface weft and the lining weft yarns are made of functional nylon yarn, or the surface weft is made of functional nylon yarn and the lining weft is matched with mulberry silk.

[0037] Example 2: A silk-nylon interwoven fabric with balanced UV resistance and comfort, the method is as follows: Step 1, preparing a composite masterbatch with UV resistance using nano-titanium dioxide and nylon chips; The composite masterbatch is made by mixing nylon chips and composite powder: The composite powder is composed of 77% nano-TiO2, 20% UV-328, 0.8% hydroxylated graphene quantum dots, and 2.2% sodium polyacrylate by weight. The ratio of nylon chips to composite powder is 9:1; Step 2, spinning nylon filaments, the composite masterbatch prepared in step 1 and the nylon chips are melted at high temperature and uniformly mixed in a ratio of 10:90-15:85, extruded through a screw extruder, formed into a thin stream using a cross-shaped special-shaped spinneret, and subjected to a spinning process including blow cooling, technical oiling, stretching and shaping, and winding and burning to obtain functional FDY nylon filaments with special cross-sections; Step 3, fabric preparation, using mulberry silk as warp yarn and the nylon filament yarn with UV resistance prepared in step 2 as weft yarn, and then interweaving them through a weaving process to obtain a silk nylon interwoven fabric; wherein the mulberry silk warp yarn density is 800-1100 yarns / 10cm, the single yarn fineness is 20D-40D, the nylon silk weft yarn density is 400-800 yarns / 10cm, the single yarn fineness is 20D-60D, and the F number of the single yarn is greater than or equal to 24; the spinning speed is 2700-3500n / min, the draft ratio is 1.1-1.3, the cooling air temperature is 15-20°C, the relative humidity is 70%-90%, and the wind speed is 0.4-0.7m / s. When preparing the fabric, the fabric structure is plain weave, twill weave, satin weave, openwork weave, weft-heavy weave, and double-layer weave; when twill weave and satin weave are used, weft twill and weft satin structures are used to make the nylon yarn float on the surface of the fabric and the silk yarn is on the bottom layer of the fabric; when weft-heavy weave and double-layer weave are used, the weft yarn configuration mode is switched through the shuttle design control according to the different balance requirements of anti-ultraviolet sun protection and comfort; the weft yarn configuration mode includes: both the surface weft and the lining weft yarns are made of functional nylon yarn, or the surface weft is made of functional nylon yarn and the lining weft is matched with mulberry silk.

[0038] The fabrics prepared in Example 1 and Example 2 were subjected to performance tests.

[0039] After testing, the performance is shown in the table below: The following is a completely new approach to preparing sun-protective clothing.

[0040] Example 3: A new method for preparing sun-protective clothing, the method specifically comprises the following steps: (1) Design of sun-protective clothing styles: First, design the style of the clothing based on ergonomics; then, determine the sun protection area of ​​the clothing based on the sun protection needs; finally, design the clothing structure based on the style and sun protection area; (2) Sun protection clothing design drawings: According to the style, size and sun protection area of ​​sun protection clothing, the CAD layout drawings of each clothing piece sample are integrated into the woven jacquard fabric design drawings; According to the different sun protection areas and the requirements of sun protection levels, the corresponding weave structure, shuttle settings and weft density are set, and the sun protection clothing pieces and fabrics are integrated into the design to obtain the pattern card file of the jacquard fabric; Different weave structures are designed according to the different sun protection levels of the sun protection areas. For high sun protection areas, a heavy weft weave structure is used, and the weft yarns are made of fully sun-protective nylon yarns with a weft yarn density greater than or equal to 480 yarns / 10 cm; for medium sun protection areas, a weft-surface weave structure is used, with a weft yarn density between 400 and 480 yarns / 10 cm; for low sun protection areas, an open-hole weave structure is used, with a weft yarn density between 400 and 480 yarns / 10 cm. (3) Fabric weaving: using mulberry silk as the warp yarn and UV-resistant functional nylon filament yarn as the weft yarn, using a large jacquard loom, and weaving a one-piece fabric according to the pattern file design obtained in step (2); (4) Cutting and sewing garment pieces: Cutting garment pieces from different parts of the jacquard fabric made of silk and nylon, along the boundaries of the garment pieces shown by the jacquard, and using these garment pieces to make the prototype of the sun-protective clothing; (5) Pattern effect production: using luminous yarn and embroidery technology to design patterns with luminous effects on the front chest, back, sleeves, seams and other areas of the body; (6) Sun protection monitoring production: Apply ultraviolet sensitive color-changing paint to the local area of ​​the large sleeves for coating design or collage ultraviolet color-changing fabrics to realize the ultraviolet monitoring function of the sun protection clothing.

[0041] The present invention divides the structure of sun-protective clothing into different zones according to the balance between sun protection and comfort in different areas of the human body, including high sun protection zone: head, neck, back, shoulders, and upper arms; medium sun protection zone: chest and waist, sides of waist, and lower arms; low sun protection zone: the hem area below the waistline (overlapping area with bottoms); silk and nylon interwoven fabrics with different sun protection levels are selected for splicing in different clothing areas; at the same time, multi-layer fabric combination design and appropriate ventilation design can be further used for the high sun protection area of ​​the clothing, ultimately achieving the development of silk sun-protective clothing with the best balance between sun protection and comfort. Effects such as Figure 1 As shown in the figure, the high sun protection area includes: 1 is the hat, 2 is the brim, 3 is the shoulder of the body, 4 is the back of the body, and 5 is the large sleeve. These areas are all made of fabric A; the medium protection area includes: 6 is the front of the body, 7 is the back hem of the body, and these areas are all made of fabric B; the low protection area includes: 8 is the waist and sides of the body, 9 is the small sleeve; these areas are all made of fabric C; in addition, 10 is a luminous pattern, 11 is an anti-UV monitoring print, 12 is a head opening, 13 is a shoulder opening, and 14 is a back opening.

[0042] Based on the structure of the above sun protection clothing, an integrated fabric is set up, and then the garment pieces are cut according to the structure of each part, and finally the garment pieces are sewn into shape.

[0043] Using luminous yarn and embroidery techniques, designs with luminous patterns are created on the front, back, sleeves, and seams of the garment. (b) UV-sensitive photochromic coatings are applied to localized areas of the sleeves for a printed design or by assembling UV-sensitive photochromic fabrics to achieve UV monitoring capabilities.

[0044] The sun protection clothing is tested for UV protection performance and air and moisture permeability.

[0045] With reference to the standard CB / T 18830-2009 “Evaluation of UV Protection Performance of Textiles”, the UV-2000F Textile Anti-UV Factor Tester was selected to conduct UV protection performance test; According to GB / T 5453-1997 "Determination of Air Permeability of Textile Fabrics", the FX 3300 fabric air permeability tester was used to test the air permeability performance. Referring to GB / T 12704.2-2009 “Test method for water vapor permeability of textile fabrics - Part 2: Evaporation method”, the NF5016 fabric water vapor permeability comprehensive function tester was selected to carry out the water vapor permeability test.

[0046] The test results are shown in Table 1.

[0047] It is obvious to those skilled in the art that certain modifications, combinations and variations can be made based on the above teachings.

Claims

1. A silk-nylon interwoven fabric with balanced UV resistance and comfort, characterized by: The silk nylon interwoven fabric is prepared according to the following preparation method: Step 1, preparing a composite masterbatch with UV resistance using nano-titanium dioxide and nylon chips; Step 2, spinning nylon filaments, the composite masterbatch prepared in step 1 and nylon chips are melted at high temperature and uniformly mixed in a ratio of 10:90-15:85, extruded through a screw extruder, formed into a thin stream using a shaped spinneret, and subjected to a spinning process including blow cooling, technical oiling, stretching and shaping, and winding and burning to obtain functional FDY nylon filaments with a special cross-section; Step 3, fabric preparation, using mulberry silk as warp yarn and the nylon filament yarn with UV resistance prepared in step 2 as weft yarn, and then interweaving them through a weaving process to obtain a silk nylon interwoven fabric; wherein the mulberry silk warp yarn density is 800-1100 yarns / 10cm, the single yarn fineness is 20D-40D, the nylon silk weft yarn density is 400-800 yarns / 10cm, the single yarn fineness is 20D-60D, and the F number of the single yarn is greater than or equal to 24; when preparing the fabric, the fabric structure adopts one or more of plain weave, twill weave, satin weave, openwork weave, weft-weight weave, and double-layer weave.

2. The silk-nylon interwoven fabric according to claim 1, characterized in that: In step 3, when twill weave and satin weave are made, weft twill and weft satin structures are adopted so that the nylon yarn floats on the surface of the fabric and the silk yarn is on the bottom layer of the fabric.

3. The silk-nylon interwoven fabric according to claim 1, characterized in that: In step 3, when the weft is heavy or double-layered, the weft yarn configuration mode is switched through the shuttle design control according to the different balance requirements between UV protection and comfort; the weft yarn configuration modes include: both the surface weft and the lining weft yarns are made of functional nylon yarn, or the surface weft is made of functional nylon yarn and the lining weft is made of mulberry silk.

4. The preparation method according to claim 1, wherein: The preparation method of the composite masterbatch in step 1 is as follows: Step 1, preparation of pre-dispersion liquid: plasma-activated nano-TiO2, UV-328 dissolved in ethanol, and a solution of hydroxylated graphene quantum dots dispersed in DMF were mixed, 5 wt% of sodium polyacrylate was added as a dispersant, and ultrasonic treatment was performed for 1 hour to form a pre-dispersion liquid; By weight percentage: nano-TiO2 is 73-77%, UV-328 is 20-25%, hydroxylated graphene quantum dots is 0.3-0.8%, and sodium polyacrylate is 1.5-2.5%; Step 2: evaporating the solvent by distilling the pre-dispersed liquid under reduced pressure at 60° C. to remove ethanol / DMF to obtain a composite powder; Step 3, masterbatch preparation, the composite powder and nylon chips are melt-blended in a ratio of 1-2:9 through a twin-screw extruder, the blending temperature adopts a gradient temperature, specifically 220℃-235℃-230℃, and after pelletizing, vacuum drying at 60-80℃ for more than 4h to obtain the composite masterbatch.

5. The preparation method according to claim 1, wherein: The particle size of the nano titanium dioxide powder in step 1 is 100-350 nm.

6. The preparation method according to claim 1, wherein: The nylon slices in step 1 and step 2 are semi-dull or fully-dull nylon 6 or nylon 66.

7. The preparation method according to claim 1, wherein: The spinneret holes of the spinneret in step 2 are in a cross shape, a Y shape, a dumbbell shape or the like.

8. The preparation method according to claim 1, wherein: In the step 2, the spinning speed is 2700-3500 n / min, the draft ratio is 1.1-1.3, the cooling air temperature is 15-20° C., the relative humidity is 70%-90%, and the wind speed is 0.4-0.7 m / s.

9. A method for preparing sun-protective clothing using the above-mentioned silk and nylon interwoven fabric, characterized in that: The steps include: (1) Design of sun-protective clothing styles: First, design the style of the clothing based on ergonomics; then, determine the sun protection area of ​​the clothing based on the sun protection needs; finally, design the clothing structure based on the style and sun protection area; (2) Sun protection clothing design drawings: According to the style, size and sun protection area of ​​sun protection clothing, the CAD layout drawings of each clothing piece sample are integrated into the woven jacquard fabric design drawings; According to the different sun protection areas and the requirements of sun protection levels, the corresponding weave structure, shuttle settings and weft density are set, and the sun protection clothing pieces and fabrics are integrated into the design to obtain the pattern card file of the jacquard fabric; (3) Fabric weaving: using mulberry silk as the warp yarn and UV-resistant functional nylon filament yarn as the weft yarn, using a large jacquard loom, and weaving a one-piece fabric according to the pattern file design obtained in step (2); (4) Cutting and sewing garment pieces: Cutting garment pieces from different parts of the jacquard fabric made of silk and nylon, along the boundaries of the garment pieces shown by the jacquard, and using these garment pieces to make the prototype of the sun-protective clothing; (5) Pattern effect production: using luminous yarn and embroidery technology to design patterns with luminous effects on the front chest, back, sleeves, seams and other areas of the body; (6) Sun protection monitoring production: Apply ultraviolet sensitive color-changing paint to the local area of ​​the large sleeves for coating design or collage ultraviolet color-changing fabrics to realize the ultraviolet monitoring function of the sun protection clothing.

10. The method according to claim 9, characterized in that: In step (2), different weave structures are designed according to the different sun protection levels of the sun protection areas. For high sun protection areas, a heavy weft weave structure is adopted, and the weft yarns are made of nylon yarn with full sun protection function, and the weft yarn density is greater than or equal to 480 yarns / 10 cm; for medium sun protection areas, a weft surface weave structure is adopted, and the weft yarn density is in the range of 400~480 yarns / 10 cm; for low sun protection areas, an open-hole weave structure is adopted, and the weft yarn density is in the range of 400~480 yarns / 10 cm.

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