Grey yarn fabric with cool feeling, sun protection, moisture absorption, quick drying and antibacterial functions and preparation method of greige yarn fabric with cool feeling, sun protection, moisture absorption, quick drying and antibacterial functions

Abstract

The invention belongs to the technical field of functional fiber materials and functional textiles, and particularly relates to grey yarn fabric with cool feeling, sun protection, moisture absorption, quick drying and antibacterial functions and a preparation method of the grey yarn fabric. The grey yarn fabric is formed by weaving functional grey yarn, the functional grey yarn is composed of a plurality of thermoplastic polymer monofilaments, the cross section of each monofilament is a cloud-shaped multi-leaf special-shaped section with 4-6 filleted convex leaves, and an open type guide groove continuously extending in the axial direction of the monofilament is formed between every two adjacent leaves; the outer surface layer of the monofilament is provided with a sun-proof enrichment annular zone, and an antibacterial enrichment zone is arranged in the area adjacent to the root of the guide groove. An outer-layer sunscreen annular belt is formed firstly, and then an antibacterial local melt is guided into the position close to the root of a guide groove, so that the guide groove in the surface of the monofilament, gaps between the monofilaments and fabric pores are communicated with one another, and a multi-scale heat and mass transfer channel is formed. According to the invention, an after-finishing coating is abandoned, through coupling of the grey yarn microstructure and the function partition, multi-functional synergy is realized, and excellent washability, high air permeability and snagging resistance are achieved.

Description

Technical Field

[0001] This invention relates to the field of functional fiber materials and functional textiles, specifically to a raw yarn fabric with cooling, sun protection, moisture absorption and quick-drying and antibacterial functions, and its preparation method. Background Technology

[0002] To simultaneously achieve sun protection, cooling sensation, moisture wicking and quick-drying, and antibacterial properties, existing functional clothing fabrics typically employ the following technical approaches:

[0003] The first type involves imparting sun protection, cooling, or antibacterial functions to the fabric surface through finishing agents. While this method is easy to prepare, the functional layer is located on the fabric surface and is prone to peeling or degradation after repeated washing, resulting in insufficient wash resistance.

[0004] The second type involves blending cooling fibers, UV-resistant fibers, and antibacterial fibers in specific proportions to achieve multi-functionality. This approach is more complex and costly, and the different functional fibers can easily interfere with each other in terms of dyeing and finishing adaptability, hand feel, and wearing comfort.

[0005] The third type uses a double- or multi-layer composite structure, where different functional layers perform functions such as moisture absorption, heat shielding, sun protection, or antibacterial properties. While this type of solution achieves multifunctional integration, it often increases fabric thickness, which is detrimental to the breathability and skin-friendly comfort requirements of lightweight summer clothing.

[0006] The fourth type uses conventional irregular cross-section fibers such as trefoil and cross-sections to improve moisture-wicking and quick-drying properties, and then combines them with functional particle additions or finishing processes to achieve sun protection and antibacterial effects. However, this type of solution usually still finds it difficult to form a stable multi-functional synergistic mechanism at the same yarn level, especially in terms of simultaneously achieving a cooling sensation, washability, and the snagging risk common to irregularly shaped fibers.

[0007] Therefore, it is still necessary to provide a raw yarn fabric and its preparation method that takes the microstructure of the original yarn monofilament as the core, and can simultaneously achieve cooling, sun protection, moisture absorption and quick drying and antibacterial functions without relying on post-treatment functional coatings, while taking into account breathability, washability and fabric durability. Summary of the Invention

[0008] To address the shortcomings of existing technologies, the purpose of this application is to provide a raw yarn fabric with cooling, sun protection, moisture-wicking and quick-drying, and antibacterial functions, as well as a method for preparing the same.

[0009] To achieve the above objectives, this application provides the following technical solution:

[0010] A raw yarn fabric with cooling, sun protection, moisture-wicking and quick-drying and antibacterial functions is characterized in that the raw yarn fabric is woven from functional raw yarn, which is composed of multiple thermoplastic polymer monofilaments.

[0011] The cross-section of the monofilament has 4 to 6 rounded outward-convex lobes, and an open guide groove is formed between adjacent lobes that extends continuously along the axis of the monofilament.

[0012] The outer surface of the monofilament is provided with a sun-protective enrichment ring zone, and the area near the root of the guide groove is provided with an antibacterial enrichment zone.

[0013] The guide groove opens outward along the radial direction of the monofilament, and the gap between the filaments formed after the guide groove and the monofilament are combined, as well as the fabric pores formed by weaving, are continuously connected in space to form a fluid transport network.

[0014] In a preferred embodiment, the thermoplastic polymer is polyethylene terephthalate, polyamide 6, or a blend of the two polymers.

[0015] In a preferred embodiment, the ratio of the radius R of the leaflet end of the monofilament to the equivalent diameter D of the monofilament, R / D, is 0.08 to 0.16; the ratio of the depth h of the guide groove to the equivalent diameter D of the monofilament, h / D, is 0.12 to 0.24; and the ratio of the opening width w of the guide groove to the equivalent diameter D of the monofilament, w / D, is 0.06 to 0.14.

[0016] In a preferred embodiment, the thickness of the sunscreen enrichment ring zone is 10% to 24% of the equivalent radius of the monofilament;

[0017] The total area of ​​all antibacterial enrichment zones accounts for 4% to 10% of the cross-sectional area of ​​the monofilament.

[0018] In a preferred embodiment, the sunscreen enrichment ring region contains functional UV-protective inorganic fillers, including titanium dioxide and zinc oxide, based on the total mass of the monofilaments; the content of titanium dioxide is 2.0–4.5 wt%, and the content of zinc oxide is 0.4–1.2 wt%, based on the total mass of the monofilaments.

[0019] The antibacterial enrichment zone contains a functional antibacterial inorganic filler, which is silver zinc phosphate antibacterial glass with a content of 0.15 to 0.50 wt%.

[0020] In a preferred embodiment, the titanium dioxide has a d50 particle size of 180–280 nm, the zinc oxide has a d50 particle size of 80–150 nm, and the silver zinc phosphate antibacterial glass has a d50 particle size of 0.30–0.80 μm.

[0021] In a preferred embodiment, the surfaces of the functional UV-protective inorganic filler and the functional antibacterial inorganic filler are coated with a compatibility layer, which includes a polyester oligomer and γ-glycidoxypropyltrimethoxysilane.

[0022] A method for preparing a raw yarn fabric with cooling, sun protection, moisture-wicking and quick-drying, and antibacterial functions, characterized by comprising the following steps:

[0023] The main melt M1, the outer ring melt M2, and the local melt M3 are melted, metered, and then introduced into the same spinneret assembly.

[0024] First, the outer ring melt M2 covers the outside of the main melt M1 to form a continuous ring band. Then, the local melt M3 is introduced into the upstream of the annular split channel contraction section through the lateral microchannel. After that, it is shaped and extruded as a whole through the spinneret assembly with 4 to 6 rounded cloud-shaped channels to form a monofilament.

[0025] Monofilaments are cooled, wound, drawn, and heat-set to form shaped yarns; multiple shaped yarns are combined to form functional yarns.

[0026] The functional yarn is then processed into fabric through knitting or weaving.

[0027] In a preferred embodiment, the spinneret assembly has a three-stage manifold. The main melt M1 enters through the central flow channel, the outer ring melt M2 surrounds the main melt M1 through the annular branch channel, and the local melt M3 is injected through an independent lateral microchannel. The outlet of the lateral microchannel is located 0.5 to 2.0 mm upstream of the contraction section of the annular branch channel, and the outlet cross-section is slit-shaped with a width of 0.6 to 0.9 times the width of the guide groove opening.

[0028] At 280℃ and a shear rate of 1000s -1 Under these conditions, the apparent viscosity ratio η(M2) / η(M1) of the outer ring melt M2 to the main melt M1 is 1.08 to 1.25, and the apparent viscosity ratio η(M3) / η(M1) of the local melt M3 to the main melt M1 is 1.15 to 1.35.

[0029] In a preferred embodiment, the residence time of the local melt M3 from its introduction to the spinneret outlet is 0.15 to 0.80 s;

[0030] The melt extrusion temperature is 278–288℃, the side blowing temperature is 18–24℃, the air velocity is 0.30–0.55 m / s, and the pre-oriented winding speed is 900–1300 m / min;

[0031] The monofilament undergoes primary drawing, secondary drawing, and heat setting treatments. The primary drawing temperature is 80–95℃ with a primary drawing ratio of 1.40–1.60, the secondary drawing temperature is 120–145℃ with a secondary drawing ratio of 1.10–1.25, the heat setting temperature is 175–188℃, and the heat setting time is 20–60 seconds.

[0032] By adopting the above technical solution, the beneficial effects of this invention are as follows: First, the rounded cloud-shaped multi-leaf cross-section forms continuous guide grooves on the surface of the monofilament, allowing sweat to spread and migrate rapidly along the guide grooves, thereby improving moisture absorption and quick-drying efficiency; after the sweat migrates to the skin side, it evaporates and carries away heat, thus creating a cooling sensation. Second, the guide grooves on the monofilament surface, the gaps between the yarns formed, and the fabric pores together constitute multi-scale heat and mass transfer channels, so that the heat and moisture transfer is not limited to the surface of the monofilament, but forms a connected network at the micro, meso, and macro levels, thereby simultaneously taking into account moisture absorption and quick-drying, breathability, and evaporative heat dissipation performance. Third, the sunscreen component is located in the outer ring region closest to the incident light, and the antibacterial component is located in the area adjacent to the guide groove closest to the sweat retention path, so that different functional components correspond to different action sites, improving utilization efficiency with the same total addition amount. Fourth, the leaf-shaped ends adopt rounded transitions, which reduces the contact stress of sharp corners while maintaining the guide grooves and specific surface area, which helps to reduce the risk of snagging in the use of irregularly shaped fibers.

[0033] Therefore, this invention does not simply stack the functions together, but rather forms a synergistic relationship through the rounded cloud-shaped cross-section, the outer ring sun protection zone, the antibacterial zone adjacent to the guide groove, and the matching of viscosity ratio and residence time: the rounded structure determines the balance between the guide groove depth and the risk of snagging, the outer ring sun protection zone determines the ultraviolet shielding site, the antibacterial zone adjacent to the guide groove determines the antibacterial action site, and the viscosity ratio and residence time determine whether the partition can be stably retained during the spinning process. This solves the three problems that are prone to snagging in deep guide groove structures, low uniform mixing efficiency, and poor washability in post-treatment. Attached Figure Description

[0034] Figure 1 This is a flowchart of the method for preparing the raw yarn fabric of the present invention; Figure 2 This is a schematic diagram of the multi-scale heat and mass transfer channels in the original yarn fabric of the present invention. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the following embodiments are only for illustrating the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Equivalent substitutions or conventional adjustments made by those skilled in the art to the types of raw materials, amounts added, process parameters, and testing conditions without departing from the technical concept of the present invention should all fall within the scope of protection of the present invention.

[0036] To facilitate understanding, the relevant terms in this manual will be explained as follows.

[0037] Functional component: refers to a functional material that is pre-introduced into the raw yarn spinning melt system and fixed within a predetermined area of ​​the monofilament during the monofilament forming process. The functional component in this invention is preferably a functional inorganic filler, including functional UV-protective inorganic fillers and functional antibacterial inorganic fillers.

[0038] Finishing auxiliaries: These are functional materials applied to the surface of yarns, fabrics, or textiles after they have been formed, through methods such as padding, spraying, coating, impregnation, lamination, or similar means. The functional components in this invention are not finishing auxiliaries; their function originates from the embedded distribution structure during the yarn forming stage, rather than from the surface adhesion layer after fabric formation.

[0039] Guide groove root: The transition area where the bottom of the guide groove meets the base of the blade. This area corresponds to the melt shear stress concentration zone during the spinning process and is the structural site where local melt M3 preferentially adheres and settles.

[0040] Rounded-corner cloud-shaped multi-leaf irregular cross section: refers to a cross section structure with 4 to 6 rounded-corner outward-convex leaflets, and adjacent leaflets forming an open guide groove that extends continuously along the single filament axis.

[0041] The raw material system and compatibility treatment are as follows:

[0042] Matrix polymer: preferably polyethylene terephthalate (PET), polyamide 6 (PA6), or a blend of the two. When using PET, spinning-grade PET chips are preferred; when using PA6, spinning-grade PA6 chips are preferred.

[0043] Functional UV-protective inorganic fillers: These fillers include titanium dioxide and zinc oxide. The titanium dioxide is preferably rutile titanium dioxide with a d50 particle size of 180–280 nm; the zinc oxide has a d50 particle size of 80–150 nm. Based on the total mass of the monofilaments, the titanium dioxide content is controlled at 2.0–4.5 wt%, and the zinc oxide content is controlled at 0.4–1.2 wt%.

[0044] Functional antibacterial inorganic filler: The preferred functional antibacterial inorganic filler is silver-zinc phosphate antibacterial glass with a d50 particle size of 0.30–0.80 μm. The content of the antibacterial inorganic filler, based on the total mass of monofilaments, is controlled at 0.15–0.50 wt%.

[0045] Since functional inorganic fillers need to maintain stable dispersion in the high-shear region of irregularly shaped guide channels, they are prone to agglomeration, migration, or localized blockage during confluence and stretching without interfacial compatibility treatment. Therefore, this invention preferably performs surface compatibility treatment on the functional inorganic fillers.

[0046] Specifically, for the compatibility treatment of the UV-resistant inorganic filler, titanium dioxide and zinc oxide are added to an ethanol / water mixed solution, with an ethanol / water mass ratio of 70 / 30; the pH of the system is adjusted to 4.5–5.5; polyester oligomer and γ-glycidyl etheroxypropyltrimethoxysilane are added. The amount of polyester oligomer added is 3.0–6.0 wt% of the inorganic filler mass; the amount of γ-glycidyl etheroxypropyltrimethoxysilane added is 0.5–1.0 wt% of the inorganic filler mass. The mixture is mechanically stirred at room temperature for 20–30 min, then ultrasonically dispersed for 20–40 min, and finally dried at 80–120 °C for 2–4 h to obtain a functional UV-resistant inorganic filler with a compatibility layer on its surface.

[0047] Specifically, the compatibility treatment of the antibacterial inorganic filler involves adding silver-zinc phosphate antibacterial glass to an ethanol / water mixture (ethanol to water mass ratio 70 / 30); adjusting the pH of the system to 4.5–5.5; and adding polyester oligomer and γ-glycidyl etheroxypropyltrimethoxysilane. The amount of polyester oligomer added is 2.0–4.0 wt% of the antibacterial inorganic filler mass; the amount of γ-glycidyl etheroxypropyltrimethoxysilane added is 0.3–0.8 wt% of the antibacterial inorganic filler mass. The mixture is mechanically stirred at room temperature for 20–30 min, then ultrasonically dispersed for 20–40 min, and finally dried at 80–120 °C for 2–4 h to obtain a functional antibacterial inorganic filler with a compatibility layer on its surface.

[0048] The aforementioned compatibility layer is not a finishing agent layer after fabric formation, but rather an interfacial compatibility treatment layer pre-constructed on the surface of functional inorganic fillers. Its function is to improve the wettability and dispersion stability of fillers in the spinning melt, and reduce their agglomeration, migration, or local accumulation in the guide groove forming area.

[0049] The spinneret assembly and the three-melt path are as follows:

[0050] The spinneret assembly adopts a multi-melt confluence irregular shape spinneret assembly, preferably including three-stage confluence cavities: the first confluence cavity is used to introduce the main melt M1; the second confluence cavity is used to cover the outer ring melt M2 around M1; and the third confluence cavity is used to guide the local melt M3 into the position near the root of the predetermined guide groove.

[0051] The main melt M1 enters through the central flow channel, the outer ring melt M2 surrounds M1 through an annular branch channel, and the local melt M3 is injected through an independent lateral microchannel. The outlet of the lateral microchannel is located 0.5–2.0 mm upstream of the contraction section of the annular branch channel, and the outlet cross-section is slit-shaped, positioned opposite to the forming area at the root of the corresponding guide groove. Preferably, the outlet width of the lateral microchannel is controlled to be 0.6–0.9 times the opening width of the target guide groove.

[0052] The above-described process, which first forms the outer ring sun protection zone and then introduces the local antibacterial zone, forms the basis for the stable spatial partitioning structure of this invention. If the two types of functional inorganic fillers are premixed and then fed into single-strand melt spinning, it is difficult to obtain a clear outer ring UV protection zone and an antibacterial zone adjacent to the guide groove. If the local antibacterial melt is introduced first and then the outer ring zone is formed, the local antibacterial zone is easily dragged to the leaflet tip or outer surface, leading to partitioning instability.

[0053] The coupling relationship between the process window and the function is as follows:

[0054] In this invention, the structural parameters of the monofilament preferably satisfy the following: the ratio of the radius R of the leaflet end of the monofilament to the equivalent diameter D of the monofilament, R / D, is 0.08 to 0.16; the ratio of the guide groove depth h to the equivalent diameter D of the monofilament, h / D, is 0.12 to 0.24; and the ratio of the guide groove opening width w to the equivalent diameter D of the monofilament, w / D, is 0.06 to 0.14.

[0055] Among these, R / D, h / D, and w / D are not isolated parameters, but rather collectively determine the ability of the guide channel to form a liquid film, the degree of stress concentration at sharp corners, and the balance between moisture wicking and anti-snagging. When R / D is less than 0.08, the blade tip is too sharp, stress concentration at the hook point increases, and the risk of snagging increases; when R / D is greater than 0.16, the blade is too blunt, the guide channel boundary weakens, and the wicking driving force decreases. When h / D is less than 0.12, the guide channel is too shallow and cannot form a stable liquid film for traction; when h / D is greater than 0.24, the root of the guide channel is too thin, making it prone to instability after stretching. When w / D is less than 0.06, sweat has difficulty entering the guide channel; when w / D is greater than 0.14, the capillary negative pressure decreases, and the moisture wicking speed decreases.

[0056] Viscosity window: at 280℃ and a shear rate of 1000 s. -1 Under these conditions, the apparent viscosity ratio η(M2) / η(M1) of the outer ring melt M2 to the main melt M1 is controlled at 1.08–1.25; the apparent viscosity ratio η(M3) / η(M1) of the local melt M3 to the main melt M1 is controlled at 1.15–1.35. When η(M2) / η(M1) is too low, the outer ring region is discontinuous; when it is too high, the outer ring region is too thick and squeezes the guide channel opening. When η(M3) / η(M1) is too low, M3 is prone to diffusion and layering; when it is too high, M3 has insufficient local flow and is prone to block fracture.

[0057] Apparent viscosity was measured using a capillary rheometer at a temperature of 280℃ and a shear rate of 1000 s⁻¹. -1 .

[0058] Residence time window: The residence time of the local melt M3 from its introduction to the spinneret outlet is controlled to be 0.15–0.80 s. The residence time is calculated by dividing the flow path length between the M3 introduction point and the spinneret outlet by the average melt velocity of the corresponding section. When the residence time is less than 0.15 s, M3 has not settled stably; when the residence time is greater than 0.80 s, M3 undergoes excessive diffusion with the surrounding melt, and the boundary of the antibacterial zone becomes blurred.

[0059] This invention employs a flow sequence that first forms an outer ring sun-protection zone and then introduces a localized antibacterial zone. This ensures that the functional UV-protective inorganic filler is preferentially distributed on the outer surface of the monofilament, while the functional antibacterial inorganic filler is preferentially distributed in the area adjacent to the root of the guide channel. If the localized melt M3 is introduced prematurely, or if M2 and M3 are premixed and introduced simultaneously, it can easily lead to blurred boundaries of the antibacterial zone, migration towards the leaflet tip, or cross-layering with the outer ring zone, thereby affecting the stability of the partitioned structure.

[0060] like Figure 1 As shown, the preparation method of the original yarn fabric of the present invention includes the following steps: S1, pretreating the matrix polymer and functional inorganic filler, and preparing the main melt M1, the outer ring melt M2 and the local melt M3 respectively; S2, melting and metering the main melt M1, the outer ring melt M2 and the local melt M3 respectively and conveying them to the spinneret assembly; S3, first making the outer ring melt M2 cover the outside of the main melt M1 to form a continuous ring, and then guiding the local melt M3 into the corresponding forming area at the root of the guide groove; S4, shaping and extruding the whole through the rounded cloud-shaped spinneret to form a shaped monofilament; S5, cooling, winding, stretching and heat setting the shaped monofilament to obtain the shaped yarn; S6, combining multiple shaped yarns to form a functional original yarn, and then forming the original yarn fabric through knitting or weaving processes.

[0061] Example 1:

[0062] (1) Raw material composition:

[0063] The matrix polymer is PET; based on the total mass of monofilaments, the functional UV-protective inorganic filler contains 3.5 wt% titanium dioxide and 0.8 wt% zinc oxide; the functional antibacterial inorganic filler contains 0.30 wt% silver zinc phosphate antibacterial glass; the remainder is PET matrix.

[0064] (2) Melt preparation:

[0065] PET chips were dried at 160℃ for 4 hours, with the moisture content controlled below 0.005%, to obtain the main melt M1. Compatible titanium dioxide and zinc oxide were blended with PET to form the outer ring melt M2. Compatible silver-zinc phosphate antibacterial glass was blended with PET to form the partial melt M3.

[0066] (3) Confluence and Spinning:

[0067] M1, M2, and M3 are introduced into the same spinneret assembly using independent metering systems. First, M2 is wrapped around M1 to form a continuous annular band. Then, M3 is introduced upstream of the contraction section of the annular splitter channel through a lateral microchannel. The spinneret orifice is a 4-bladed, rounded, cloud-shaped channel. The melt extrusion temperature is controlled at 285℃. The extrusion is performed at 280℃ and a shear rate of 1000 s⁻¹. -1 Under these conditions, η(M2) / η(M1) = 1.15, η(M3) / η(M1) = 1.22. The residence time of M3 from its introduction to the spinneret outlet is controlled to be 0.40 s.

[0068] (4) Cooling, winding, stretching and heat setting:

[0069] The side-blowing temperature is 20℃ and the wind speed is 0.40m / s; the pre-orientation winding speed is 1200m / min; the first-stage drawing temperature is 88℃ and the first-stage drawing ratio is 1.50; the second-stage drawing temperature is 132℃ and the second-stage drawing ratio is 1.18; the heat setting temperature is 180℃ and the heat setting time is 40s.

[0070] (5) Monofilament structural parameters:

[0071] The equivalent diameter D of the monofilament is 15 μm; the radius of the rounded corner at the tip of the leaflet is 1.8 μm, R / D=0.12; the depth of the guide groove is 3.0 μm, h / D=0.20; the opening width of the guide groove is 1.5 μm, w / D=0.10; the thickness of the sunscreen enrichment ring zone is 18% of the equivalent radius of the monofilament; the total area of ​​the antibacterial enrichment zone accounts for 6.5% of the cross-sectional area of ​​the monofilament.

[0072] (6) Formation of functional raw yarn and fabric:

[0073] 72 monofilaments are combined to form a 75D / 72F functional yarn. The yarn is then knitted using a pique weave to form a fabric with a weight of 120g / m². Subsequent processing involves only standard dyeing and finishing; no cooling, sun-protecting, moisture-wicking, or antibacterial finishing agents are applied.

[0074] like Figure 2 As shown, in the formed raw yarn fabric, the guide grooves on the surface of the monofilament 9 form monofilament surface guide groove channels, and interfilament gap channels are formed between adjacent monofilaments. After being woven into fabric, these further form fabric pore channels. Sweat can enter the monofilament surface guide groove channels from the skin side along the sweat migration path, and further migrate to the skin side through the interfilament gap channels; the water evaporation after migrating to the skin side forms a water vapor dissipation path. Thus, the monofilament surface guide grooves, interfilament gaps, and fabric pores are spatially interconnected, forming a multi-scale heat and mass transfer network.

[0075] Example 2:

[0076] Compared with Example 1, the differences are as follows: the matrix polymer is still PET; the titanium dioxide content is increased to 4.3 wt%, the zinc oxide content is increased to 1.1 wt%, and the silver zinc phosphate antibacterial glass content is 0.25 wt% by total monofilament mass; the spinneret is a 5-leaf rounded cloud-shaped channel; the equivalent diameter D of the monofilament is 12 μm; R is 1.2 μm, R / D=0.10; h is 2.4 μm, h / D=0.20; w is 1.2 μm, w / D=0.10; 96 monofilaments are combined to form a 75D / 96F functional yarn; the fabric is knitted using a pique weave, and the fabric weight is 125 g / m². The remaining raw material pretreatment, confluence and spinnereting, cooling, winding, stretching, and heat setting conditions are the same as in Example 1.

[0077] Example 3:

[0078] Compared with Example 1, the differences are as follows: the matrix polymer is still PET; the content of titanium dioxide is 2.5 wt%, zinc oxide is 0.5 wt%, and silver zinc phosphate antibacterial glass is 0.35 wt% by total monofilament mass; the spinneret is a 4-leaf rounded cloud-shaped channel; the equivalent diameter D of the monofilament is 14 μm; R is 1.5 μm, R / D is approximately 0.11; h is 2.8 μm, h / D=0.20; w is 1.4 μm, w / D=0.10; 72 monofilaments are combined to form a 75D / 72F functional yarn; the fabric is knitted using a perforated weave, with a fabric weight of 100 g / m². The remaining raw material pretreatment, confluence and spinnereting, cooling, winding, stretching, and heat setting conditions are the same as in Example 1.

[0079] Example 4 (Parameter Lower Boundary Example):

[0080] Compared with Example 1, the differences are as follows: the equivalent diameter D of the monofilament is 15 μm, the radius of the rounded corner R at the tip of the leaflet is 1.2 μm, R / D=0.08; the depth h of the guide groove is 1.8 μm, h / D=0.12; and the width w of the guide groove opening is 0.9 μm, w / D=0.06. The remaining raw material composition, melt preparation, confluence and spinning, cooling, winding, drafting, heat setting, yarn forming and weaving conditions are the same as in Example 1.

[0081] This embodiment illustrates that monofilaments can still be formed under the lower limit of parameters, and a continuous guide channel structure can be formed. When the parameters are further below this lower limit, the conditions at the guide channel boundary and the liquid entry point deteriorate, making it difficult to maintain a stable moisture-conducting path.

[0082] Example 5 (Parameter Upper Limit Boundary Example):

[0083] Compared with Example 1, the differences are as follows: the equivalent diameter D of the monofilament is 15 μm, the radius of the rounded corner R at the tip of the leaflet is 2.4 μm, and R / D = 0.16; the depth h of the guide groove is 3.6 μm, and h / D = 0.24; the opening width w of the guide groove is 2.1 μm, and w / D = 0.14. The remaining raw material composition, melt preparation, confluence and spinning, cooling, winding, drafting, heat setting, yarn forming and weaving conditions are the same as in Example 1.

[0084] This embodiment illustrates that a single filament can still be formed under the upper limit of the parameters, and the rounded cloud-shaped guide channel structure can be maintained. When the parameters are further exceeded, the rounded corners become too blunt, the guide channel becomes too wide, or the root of the guide channel becomes too thin, which can easily reduce the moisture-wicking capacity of the guide channel or worsen the structural stability.

[0085] Comparative Example 1 (circular cross-section + uniform mixing):

[0086] Titanium dioxide, zinc oxide, and silver zinc phosphate antibacterial glass are uniformly blended into PET in a single process using a circular spinneret. The remaining process conditions are essentially the same as in Example 1. This method avoids forming a rounded cloud-shaped guide channel structure, as well as an outer ring UV-protective zone and an antibacterial zone adjacent to the guide channel.

[0087] Comparative Example 2 (Cross-shaped cross section + uniform mixing):

[0088] Titanium dioxide, zinc oxide, and silver zinc phosphate antibacterial glass were uniformly blended into PET in a single process, using a standard cross-shaped spinneret. The remaining process conditions were essentially the same as in Example 1. While this method can create a moisture-wicking irregular cross-section, stress concentration at the blade ends increases the risk of wire snagging.

[0089] Comparative Example 3 (Cloud-shaped cross-section + uniformly mixed feeding):

[0090] The same rounded cloud-shaped spinneret as in Example 1 is used, but the functional UV-protective inorganic filler and the functional antibacterial inorganic filler are first uniformly mixed and then fed uniformly, without setting up partitioned melt flow channels. This scheme can form a guide channel structure, but it cannot form a clear outer ring UV-protective zone and an antibacterial zone adjacent to the guide channel.

[0091] Comparative Example 4 (Cloud-shaped cross-section + post-treatment enhancement):

[0092] The fabric is formed from raw yarn with a rounded, cloud-shaped cross-section, containing neither functional UV-protective nor functional antibacterial inorganic fillers. Sunscreen and antibacterial materials are then applied through finishing processes. The functionality of this solution originates from the finishing agent layer on the fabric surface, rather than from the embedded structure within the raw yarn.

[0093] The testing method is as follows:

[0094] UV protection performance: UPF and T(UVA)AV were determined according to GB / T18830-2009 "Evaluation of UV protection performance of textiles";

[0095] Instantaneous cooling sensation upon contact: qmax was determined according to GB / T35263-2017 "Test and evaluation of instantaneous cooling sensation performance of textiles upon contact";

[0096] Moisture absorption and quick-drying properties: The maximum wetted radius of the penetration surface was determined in accordance with GB / T21655.2-2019 "Evaluation of moisture absorption and quick-drying properties of textiles - Part 2: Dynamic moisture transfer method".

[0097] Antibacterial properties: The antibacterial rate against Staphylococcus aureus was determined according to GB / T20944.3-2008 "Evaluation of antibacterial properties of textiles - Part 3: Shaking method";

[0098] Snagging performance: The straight / cross snagging grade after washing was determined according to GB / T11047-2008 "Textiles - Evaluation of Snagging Performance of Fabrics - Hammer Method".

[0099] Air permeability: The air permeability rate was determined under a pressure drop of 100 Pa according to GB / T5453-1997 "Determination of air permeability of textile fabrics".

[0100] The main raw material compositions of the examples and comparative examples are as follows:

[0101] Table 1 Comparison of the main raw material composition and distribution patterns of the examples and comparative examples.

[0102] project Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 matrix polymer PET PET PET PET PET PET PET PET PET Titanium dioxide (wt%, based on total mass of monofilament) 3.5 4.3 2.5 3.5 3.5 3.5 3.5 3.5 Post-processing and additional Zinc oxide (wt%, based on total mass of monofilament) 0.8 1.1 0.5 0.8 0.8 0.8 0.8 0.8 Post-processing and additional Silver-zinc phosphate antibacterial glass (wt%, based on total mass of monofilaments) 0.30 0.25 0.35 0.30 0.30 0.30 0.30 0.30 Post-processing and additional Distribution of functional UV-protective inorganic fillers Outer ring sun protection rich area Outer ring sun protection rich area Outer ring sun protection rich area Outer ring sun protection rich area Outer ring sun protection rich area Uniform mixing Uniform mixing After uniform mixing, feed the materials uniformly. Surface finishing Distribution pattern of functional antibacterial inorganic fillers Antibacterial zone near the root of the guide groove Antibacterial zone near the root of the guide groove Antibacterial zone near the root of the guide groove Antibacterial zone near the root of the guide groove Antibacterial zone near the root of the guide groove Uniform mixing Uniform mixing After uniform mixing, feed the materials uniformly. Surface finishing Compatibility layer have have have have have have have have No embedded compatibility layer Compatibility layer composition Polyester oligomer + γ-glycidyl oxypropyltrimethoxysilane Same as Example 1 Same as Example 1 Same as Example 1 Same as Example 1 Same as Example 1 Same as Example 1 Same as Example 1 /

[0103] The main process and structural parameters of the embodiments and comparative examples are shown below:

[0104] Table 2 Comparison of main process and structural parameters between the examples and comparative examples

[0105] project Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Spinneret type Rounded cloud shape Rounded cloud shape Rounded cloud shape Rounded cloud shape Rounded cloud shape round Cross-shaped Rounded cloud shape Rounded cloud shape Number of petals 4 5 4 4～6 4～6 0 4 4 4 Equivalent diameter D (μm) of a single filament 15 12 14 — — 15 15 15 15 Fillet radius R (μm) 1.8 1.2 1.5 — — / Approximately 0 1.8 1.8 R / D 0.12 0.10 0.11 0.08 0.16 / Approximately 0 0.12 0.12 Guide groove depth h (μm) 3.0 2.4 2.8 — — / Approximately 3.0 3.0 3.0 h / D 0.20 0.20 0.20 0.12 0.24 / / 0.20 0.20 Guide groove opening width w (μm) 1.5 1.2 1.4 — — / Approximately 1.5 1.5 1.5 w / D 0.10 0.10 0.10 0.06 0.14 / / 0.10 0.10 η(M2) / η(M1) 1.15 1.15 1.15 1.15 1.15 / / / not applicable η(M3) / η(M1) 1.22 1.22 1.22 1.22 1.22 / / / not applicable M3 Dwell Time (s) 0.40 0.40 0.40 0.40 0.40 / / / not applicable Melt extrusion temperature (°C) 285 285 285 285 285 285 285 285 285 First-stage drawing temperature (°C) 88 88 88 88 88 88 88 88 88 First-level draw ratio 1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50 1.50 Secondary drawing temperature (°C) 132 132 132 132 132 132 132 132 132 Secondary draw ratio 1.18 1.18 1.18 1.18 1.18 1.18 1.18 1.18 1.18 Heat setting temperature (°C) 180 180 180 180 180 180 180 180 180 Heat setting time (s) 40 40 40 40 40 40 40 40 40 Raw yarn specifications 75D / 72F 75D / 96F 75D / 72F Same as Example 1 Same as Example 1 75D / 72F 75D / 72F 75D / 72F 75D / 72F Fabric structure Pearl Pearl Cave organization Same as Example 1 Same as Example 1 Pearl Pearl Pearl Pearl Fabric weight (g / m²) 120 125 100 Same as Example 1 Same as Example 1 120 120 120 120

[0106] In Table 2, “—” indicates that the absolute size parameters of the boundary embodiment are not listed separately, but are limited by the corresponding ratio parameters; “ / ” indicates that the item is not applicable to the corresponding ratio; “Not applicable” indicates that the process conditions are not applicable to the post-processing empowerment scheme.

[0107] The performance verification target ranges for the examples and comparative examples are shown below:

[0108] Table 3. Performance Verification Target Ranges for Examples and Comparative Examples

[0109] sample UPF (Target Range) T(UVA)AV (target interval, %) qmax (target interval, J / cm²·s) Maximum wetting radius (target range, mm) Liquid water diffusion rate (target range, mm / s) Staphylococcus aureus inhibition rate (target range, %) Silk hook level (target range, vertical / horizontal) Breathability (target range, mm / s) Example 1 180～260 1.0～1.8 0.24～0.30 26～32 4.5～6.0 82～90 4 / 4～5 / 5 220～320 Example 2 450～750 0.15～0.40 0.18～0.24 20～26 3.0～4.2 75～88 4 / 4～5 / 5 500～700 Example 3 80～130 1.6～2.5 0.20～0.24 20～28 3.0～5.0 85～92 3 / 3～4 / 4 220～320 Example 4 170～240 1.1～2.0 0.20～0.26 21～27 3.2～4.8 80～88 3 / 4～4 / 4 220～320 Example 5 170～240 1.1～2.0 0.19～0.25 19～25 2.8～4.2 80～88 4 / 4～5 / 5 220～320 Comparative Example 1 60～110 1.8～3.0 0.12～0.18 10～16 1.5～2.8 75～85 5 / 5 180～260 Comparative Example 2 70～120 1.6～2.5 0.20～0.26 24～30 4.0～5.5 78～86 2 / 3～3 / 3 200～280 Comparative Example 3 130～190 1.4～2.0 0.22～0.27 25～30 4.5～5.8 78～85 4 / 4 220～300 Comparative Example 4 180-260 before washing; 30-70 after washing Before washing: 1.0–1.8; After washing: 4.0–8.0 0.22–0.30 before washing; 0.08–0.15 after washing. 22～28 3.5～5.0 80-92 before washing; 45-65 after washing 4 / 4 210～290

[0110] To facilitate understanding of the performance evaluation results of the embodiments and comparative examples of this invention, the main test indicators involved in this specification are explained below: UPF is the ultraviolet protection factor, used to characterize the overall protection capability of a fabric against ultraviolet rays. The larger the UPF value, the stronger the ultraviolet protection performance of the fabric. T(UVA)AV is the average transmittance of the UVA band, used to characterize the degree of transmittance of the fabric to ultraviolet rays in the UVA band. The smaller the T(UVA)AV value, the stronger the blocking ability of the fabric to the UVA band. qmax is the instantaneous cooling sensation value, used to characterize the maximum heat flux density when the fabric sample comes into instantaneous contact with a heat source. The larger the qmax value, the more obvious the instantaneous cooling sensation of the fabric upon contact.

[0111] Based on the performance verification target ranges shown in Table 3, the performance differences between different embodiments and comparative examples follow the following directions:

[0112] Example 1 corresponds to a comprehensive performance implementation route. This example adopts a 4-leaf rounded cloud-shaped multi-leaf cross section, and sets a UV-protective enrichment ring zone on the outer surface of the monofilament, and sets an antibacterial enrichment zone in the area near the root of the guide groove. At the same time, it is combined with a medium weight knitted structure. Therefore, its performance verification target range reflects a comprehensive balance between sun protection, cooling sensation, moisture wicking and quick drying, antibacterial properties, breathability, and anti-snagging.

[0113] Example 2 corresponds to a high sun protection, anti-snagging, and breathable implementation route. This example maintains the rounded cloud-shaped guide channel structure and zoned feeding route while increasing the load of the outer ring UV-protective inorganic filler and using a pique weave and higher filament count yarn. Therefore, its performance verification target range shows a significantly higher UPF than Examples 1 and 3, a significantly lower T(UVA)AV, and the snagging level remains at a high level.

[0114] Example 3 corresponds to the lightweight and breathable balanced implementation route. This example uses a lightweight perforated or mesh structure and maintains a rounded cloud-shaped guide channel structure and an antibacterial zone near the root of the guide channel. Therefore, its UV protection performance verification target range is lower than that of Example 1 and Example 2, but the antibacterial rate, cooling sensation and breathability are still maintained at a high level.

[0115] Examples 4 and 5 correspond to the lower and upper limits of the geometric parameter window, respectively. By incorporating Examples 4 and 5 into the verification system, it can be further demonstrated that the three parameter ranges of R / D, h / D, and w / D in this invention are not arbitrarily set, but rather are effective working windows obtained after comprehensively balancing structural stability, moisture-wicking performance, and anti-snagging performance.

[0116] Comparative Example 1 uses a circular cross-section. Under the same total amount of functional filler added, due to the lack of an open guide channel extending continuously along the monofilament axis, the spreading and migration path of sweat on the monofilament surface is significantly limited. Therefore, its qmax, maximum wetting radius, and target range of liquid water diffusion rate are all significantly lower than those of Example 1. This comparative example is used to demonstrate that the guide channel structure itself is an important basis for improving cooling and moisture-wicking quick-drying performance.

[0117] Comparative Example 2 uses a cross-shaped sharp-corner cross section. Although this structure can still form a moisture-guiding path, and therefore its maximum wetting radius and liquid water diffusion rate target range are close to those of Example 1, its snagging level target range is significantly lower than that of Example 1 due to the obvious sharp corners at the blade ends and stress concentration at the hooking points. This comparative example is used to demonstrate that the significance of the rounded corner design in this invention lies not only in forming guide channels, but also in improving anti-snagging performance while maintaining the moisture-guiding capacity of the guide channels.

[0118] Comparative Example 3 uses the same cloud-shaped cross-section as Example 1, but the functional UV-protective inorganic filler and functional antibacterial inorganic filler are not fed in zones, but rather in a uniform feeding manner. Because this scheme lacks the spatial division between the outer ring UV-protective zone and the antibacterial zone adjacent to the root of the guide channel, its UPF and antibacterial rate target range are lower than those of Example 1, while qmax, maximum wetting radius, and liquid water diffusion rate remain at similar levels. This comparative example demonstrates that zoned distribution is not a formal characteristic, but a key factor in improving the utilization efficiency of functional components and enhancing overall functional performance.

[0119] Comparative Example 4 employs a finishing process to impart sun protection and antibacterial functions. This method achieves high initial values ​​of sun protection and antibacterial properties before washing, but the retention rate of these functions significantly decreases after washing. Its post-wash UPF, T(UVA)AV, qmax, and antibacterial rate target range are all significantly inferior to Example 1. This comparative example demonstrates the fundamental difference between the embedded partitioned structure of the raw yarn used in this invention and the finishing agent layer on the fabric surface. The former relies on the internal fixing structure of the monofilament, while the latter relies on the surface adhesion layer; therefore, there is a significant difference in wash resistance stability.

[0120] In summary, this invention, through a technical route of "rounded cloud-shaped multi-leaf cross-section + outer ring UV protection zone + antibacterial zone near the root of the guide groove + viscosity ratio and residence time control," can establish a clear structure-process-performance correspondence under different tissue morphologies and parameter windows. Examples 1, 2, and 3 support the technical effects of this invention from three aspects: comprehensive performance, high sun protection while maintaining anti-snagging and breathability, and the adaptability of lightweight and breathable fabrics. Examples 4 and 5 further verify the rationality of the upper and lower limits of the geometric parameter window. Comparative Examples 1 to 4 correspond to four conventional or easily failed routes: circular cross-section, sharp-cornered irregular cross-section, uniform feeding, and post-processing enhancement, respectively, to further compare the effects of different cross-sectional structures, functional component distribution methods, and enhancement paths on sun protection, cooling sensation, moisture absorption and quick-drying, antibacterial, and anti-snagging performance.

[0121] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included within the protection scope of the present invention.

Claims

1. A raw yarn fabric that combines cooling, sun protection, moisture-wicking and quick-drying, and antibacterial functions, characterized in that, The raw yarn fabric is woven from functional raw yarn, which is composed of multiple thermoplastic polymer monofilaments; The cross-section of the monofilament has 4 to 6 rounded, outwardly convex lobes, and an open guide groove is formed between adjacent lobes that extends continuously along the axis of the monofilament. The outer surface of the monofilament is provided with a sun-protective enrichment ring zone, and the area near the root of the guide groove is provided with an antibacterial enrichment zone. The guide groove opens outward along the radial direction of the monofilament, and the gap between the filaments formed after the guide groove and the monofilament are combined, as well as the fabric pores formed by weaving, are continuously connected in space to form a fluid transport network.

2. The raw yarn fabric with cooling, sun protection, moisture-wicking and quick-drying, and antibacterial functions as described in claim 1, characterized in that, The thermoplastic polymer is polyethylene terephthalate, polyamide 6, or a blend of the two polymers.

3. The raw yarn fabric with cooling, sun protection, moisture-wicking and quick-drying, and antibacterial functions according to claim 2, characterized in that, The ratio of the radius R of the leaflet end of the monofilament to the equivalent diameter D of the monofilament, R / D, is 0.08 to 0.16; the ratio of the depth h of the guide groove to the equivalent diameter D of the monofilament, h / D, is 0.12 to 0.24; and the ratio of the opening width w of the guide groove to the equivalent diameter D of the monofilament, w / D, is 0.06 to 0.

14.

4. The raw yarn fabric with cooling, sun protection, moisture-wicking and quick-drying, and antibacterial functions according to claim 3, characterized in that, The thickness of the sunscreen enrichment ring zone is 10% to 24% of the equivalent radius of the monofilament; The total area of ​​all antibacterial enrichment zones accounts for 4% to 10% of the cross-sectional area of ​​the monofilament.

5. The raw yarn fabric with cooling, sun protection, moisture-wicking and quick-drying, and antibacterial functions according to claim 4, characterized in that, Based on the total mass of monofilaments, the sunscreen enrichment ring zone contains functional UV-protective inorganic fillers, including titanium dioxide and zinc oxide; based on the total mass of monofilaments, the content of titanium dioxide is 2.0–4.5 wt%, and the content of zinc oxide is 0.4–1.2 wt%. The antibacterial enrichment zone contains a functional antibacterial inorganic filler, which is silver zinc phosphate antibacterial glass with a content of 0.15 to 0.50 wt%.

6. The raw yarn fabric with cooling, sun protection, moisture-wicking and quick-drying, and antibacterial functions according to claim 5, characterized in that, The titanium dioxide has a d50 particle size of 180–280 nm, the zinc oxide has a d50 particle size of 80–150 nm, and the silver zinc phosphate antibacterial glass has a d50 particle size of 0.30–0.80 μm.

7. The raw yarn fabric with cooling, sun protection, moisture-wicking and quick-drying, and antibacterial functions according to claim 6, characterized in that, The surfaces of the functional UV-protective inorganic filler and the functional antibacterial inorganic filler are coated with a compatibility layer, which includes polyester oligomers and γ-glycidoxypropyltrimethoxysilane.

8. A method for preparing a raw yarn fabric with cooling, sun protection, moisture-wicking and quick-drying, and antibacterial functions, characterized in that, Includes the following steps: The main melt M1, the outer ring melt M2, and the local melt M3 are melted, metered, and then introduced into the same spinneret assembly. First, the outer ring melt M2 covers the outside of the main melt M1 to form a continuous ring band. Then, the local melt M3 is introduced into the upstream of the annular split channel contraction section through the lateral microchannel. After that, it is shaped and extruded as a whole through the spinneret assembly with 4 to 6 rounded cloud-shaped channels to form a monofilament. Monofilaments are cooled, wound, drawn, and heat-set to form shaped yarns. Multiple shaped filaments are combined to form a functional yarn; The functional yarn is then processed into fabric through knitting or weaving.

9. The method for preparing the raw yarn fabric with cooling, sun protection, moisture-wicking and quick-drying, and antibacterial functions according to claim 8, characterized in that, The spinneret assembly has a three-stage manifold. The main melt M1 enters through the central channel, the outer ring melt M2 surrounds the main melt M1 through the annular branch channel, and the local melt M3 is injected through an independent lateral microchannel. The outlet of the lateral microchannel is located 0.5 to 2.0 mm upstream of the contraction section of the annular branch channel, and the outlet cross-section is slit-shaped with a width of 0.6 to 0.9 times the width of the guide groove opening. At 280℃ and a shear rate of 1000s -1 Under these conditions, the apparent viscosity ratio η(M2) / η(M1) of the outer ring melt M2 to the main melt M1 is 1.08 to 1.25, and the apparent viscosity ratio η(M3) / η(M1) of the local melt M3 to the main melt M1 is 1.15 to 1.

35.

10. The method for preparing the raw yarn fabric with cooling, sun protection, moisture-wicking and quick-drying, and antibacterial functions according to claim 9, characterized in that, The residence time of the local melt M3 from its introduction to the spinneret outlet is 0.15 to 0.80 seconds. The melt extrusion temperature is 278–288℃, the side blowing temperature is 18–24℃, the air velocity is 0.30–0.55 m / s, and the pre-oriented winding speed is 900–1300 m / min; The monofilament undergoes primary drawing, secondary drawing, and heat setting treatments. The primary drawing temperature is 80–95℃ with a primary drawing ratio of 1.40–1.60, the secondary drawing temperature is 120–145℃ with a secondary drawing ratio of 1.10–1.25, the heat setting temperature is 175–188℃, and the heat setting time is 20–60 seconds.

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