Silk blended skin-friendly fabric with intelligent humidity regulation function and weaving method thereof

Abstract

This invention relates to the field of functional textile fabric technology, specifically to a silk blended skin-friendly fabric with intelligent humidity regulation function and its weaving method, comprising: an inner layer formed of highly moisture-wicking and low-absorption swelling synthetic fibers, wherein the skin-contact surface of the inner layer has a honeycomb-shaped raised dot structure, the raised dot structure consisting of raised parts and grooved parts, the raised parts forming point contact with the skin, and the grooved parts forming moisture-wicking channels; an outer layer formed of a blend of silk fibers and highly absorbent fibers, wherein the outer layer is a combination of plain weave and satin weave, the plain weave area and the satin weave area being alternately distributed; the inner layer and the outer layer are connected by joints to form a double-layer structure; by controlling the degumming rate of the silk at 18%-22%, the moisture absorption and swelling rate of the silk fibers is reduced from the conventional 10%-15% to 6%-8%, which retains the luster and hand feel of the silk while appropriately reducing the swelling range. The addition of alginate fibers significantly enhances the moisture storage capacity of the outer layer.

Description

Technical Field

[0001] This invention relates to the field of functional textile fabric technology, specifically to a silk blended skin-friendly fabric with intelligent humidity regulation function and its weaving method. Background Technology

[0002] Silk, due to its excellent skin-friendliness, luster, and breathability, has long been widely used in high-end clothing and intimate apparel. However, pure silk fabrics have significant drawbacks when the body sweats: the radial swelling rate of silk fibers (silk protein) after absorbing moisture is as high as 10%-15%, leading to a dramatic increase in fiber cohesion and a significant increase in fabric stiffness. Simultaneously, the skin-contact surface retains moisture, resulting in a damp, cold, and sticky feeling—a problem known as "damp-cold hardening." To improve the moisture-wicking properties of silk fabrics, current technologies typically employ blending silk with moisture-wicking synthetic fibers, aiming to enhance the fabric's sweat-conducting capacity while retaining the feel of silk.

[0003] Numerous technological explorations have been undertaken to improve the moisture-wicking properties of fabrics. For example, Chinese patent CN104264348A discloses a double-layer unidirectional moisture-wicking textured fabric and its manufacturing process. This fabric includes an evaporation layer and a moisture-wicking layer woven onto the evaporation layer. The moisture-wicking layer comprises a raised dot layer and a recessed dot layer. The linear density of the moisture-wicking layer material is greater than that of the evaporation layer, allowing sweat to evaporate in one direction. The height of the raised dots increases with longitudinal stretching. This technology reduces the contact area between the fabric and the skin through its textured structure, thus solving the problem of fabric sticking to the skin after sweating to some extent. The moisture-wicking layer is woven with a mixture of polyester profiled cross-section yarn and nylon profiled cross-section yarn, while the evaporation layer is woven with polyester profiled cross-section yarn. However, this technical solution does not involve silk materials, and its focus is only on the anti-sticking problem in a "wet" state. It does not address issues such as stiffening of the hand and itching caused by changes in fiber structure after the fabric dries.

[0004] Furthermore, Chinese patent CN111648002A discloses a self-adjusting fabric and its preparation method. This fabric includes a double-layer structure area and a single-layer structure area arranged diagonally. It achieves structural self-adjustment through the use of weft yarns with breakpoints. During the dyeing process, the weft yarns with breakpoints in the double-layer structure area untwisted, dispersed, and then fill the double-layer structure area to form protrusions. The weft yarns with breakpoints in the single-layer structure area maintain their yarn shape due to the wrapping effect of the polyester filaments, thus obtaining a fabric with a single and double-layer concave-convex structure. This technology achieves a localized protrusion effect in the fabric through structural design and can be used in products such as wall coverings, insoles, and mats. However, its technical solution relies on the dissolution of water-soluble vinylon and the special design of the weft yarns with breakpoints. It aims to solve the problems of fabric three-dimensionality and functional yarn protection, but it does not address the humidity regulation function of silk blended fabrics, nor does it consider the changes in the fabric's tactile feel during rapid drying.

[0005] In summary, current improvements to silk blended fabrics either focus solely on enhancing the moisture-wicking properties of a single fiber type or address the adhesion problem in wet conditions through structural design. However, they lack effective solutions for the dual defects of silk blended fabrics during the complete humidity fluctuation process of "intense sweating → rapid drying": "wet and cold hardening" and "dry, stiff, and itchy." Specifically, the fabric hardening problem caused by the swelling of silk fibers after absorbing moisture, and the dry, stiff, and itchy problem caused by the collapse of capillary structures or sudden changes in surface tension when conventional hydrophilic blended fibers lose water rapidly, constitute a pair of contradictions that have not yet been resolved in current technologies. That is, existing fabrics cannot maintain a stable feel across the entire humidity range.

[0006] Therefore, how to provide a silk blended skin-friendly fabric that can simultaneously suppress the dual defects of "wet and cold hardening" and "dry, hard, and itchy" during severe humidity fluctuations has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a silk blended skin-friendly fabric with intelligent humidity regulation function and its weaving method. The fabric can avoid the dual defects of "wet and cold hardening" and "dry and hard itching" during the process of drastic humidity fluctuations of "intense sweating → rapid drying", and achieve stable touch feel in the whole humidity range.

[0008] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A silk blend skin-friendly fabric with intelligent humidity regulation function, comprising: The inner layer is made of highly moisture-wicking and low-absorption-swelling synthetic fibers. The skin-contact surface of the inner layer is provided with a honeycomb-shaped raised dot structure. The raised dot structure consists of raised dot portions and groove portions. The raised dot portions form point contact with the skin, and the groove portions form moisture-wicking channels. The outer layer is formed by a blend of silk fibers and highly absorbent fibers. The outer layer is a combination of plain weave and satin weave, with the plain weave area and the satin weave area being distributed alternately. The inner layer and the outer layer are connected by a junction point to form a double-layer structure; Furthermore, the fabric undergoes a micro-crosslinking elastic finishing process, forming a micro-crosslinking elastic film on the fiber surface. This micro-crosslinking elastic film limits excessive swelling of the silk fibers when they absorb moisture and maintains a low coefficient of friction between fibers during drying.

[0009] As a preferred technical solution of the present invention, the inner layer of synthetic fiber is a modified polyester filament with a cross-shaped hollow structure, a single fiber linear density of 0.8-1.2 dtex, and a water absorption swelling rate of ≤3%.

[0010] Through the above-mentioned preferred scheme, the cross-shaped hollow structure of the inner fiber forms multiple capillary channels, significantly enhancing the wicking effect; the characteristic of water absorption swelling rate ≤3% controls the expansion and deformation of the fiber itself from the source. In this invention, the inner fiber, high-twist yarn (1800-2200 twists / meter), convex structure, and hydrophilic finishing form a triple synergistic effect: the high-twist yarn provides strong wicking force to quickly draw sweat away from the skin, the hydrophilic finishing (contact angle 20°-30°) reduces interfacial resistance, and the convex structure reduces the skin-contact area by about 40%. After the three work together, the moisture wicking rate is increased by more than 120%, and the wet and cold feeling score is reduced by 65%, reducing the generation of "wet and cold feeling" from the source.

[0011] As a preferred embodiment of the present invention, the degumming rate of the outer silk fiber is 18%-22%, the highly absorbent fiber is alginate fiber, and the blending mass ratio of the silk fiber to the alginate fiber is 70:30.

[0012] By controlling the degumming rate of silk at 18%-22%, the moisture absorption and swelling rate of silk fibers is reduced from the conventional 10%-15% to 6%-8%, preserving the luster and feel of the silk while appropriately reducing the swelling range. The addition of alginate fibers (moisture regain >12%) significantly enhances the moisture storage capacity of the outer layer. In this invention, the outer layer, together with the plain / satin weave and water-repellent finishing, forms a triple synergistic effect: the plain weave area rapidly spreads moisture laterally (diffusion speed increased by 50%), the alginate fibers act as a "buffer" to absorb excess moisture and prevent local oversaturation, the satin weave area provides an efficient evaporation channel (evaporation rate increased by 60%), and the water-repellent finishing prevents moisture from seeping back into the inner layer. After the three synergistic effects, the uniformity of moisture evaporation is improved by 85%, the amount of backflow is reduced by 70%, and the overall moisture conduction efficiency is improved by more than 150%, forming a complete "diffusion-buffering-evaporation-anti-backflow" unidirectional moisture conduction closed loop.

[0013] As a preferred technical solution of the present invention, the inner layer uses high-twist yarn with a twist of 1800-2200 twists / meter, and the outer layer uses low-twist yarn with a twist of 600-800 twists / meter.

[0014] The high-twist inner yarn creates dense spiral grooves on the fiber surface, significantly enhancing the wicking effect; the low-twist outer yarn keeps the fibers fluffy, facilitating the lateral spread of moisture. This twist design, combined with the fiber material and weaving structure, creates an asymmetric wetting gradient from the inner to the outer layer, achieving efficient directional moisture transport from the inside out.

[0015] As a preferred embodiment of the present invention, the height of the honeycomb-shaped protrusions is 0.3-0.5 mm, the width of the groove is 0.2-0.3 mm, and the protrusions are arranged in a rhomboid pattern.

[0016] The aforementioned parameter design ensures that the raised dots make point contact with the skin, reducing the contact area by approximately 40%, while the grooves act as moisture-wicking channels to quickly transport sweat to the outer layer. This structure, in conjunction with the inner layer's high-twist yarn and hydrophilic finishing, achieves the optimal effect of "point contact moisture wicking," reducing the sticky feeling of dampness from a physical structural perspective.

[0017] As a preferred technical solution of the present invention, the micro-crosslinked elastic finishing uses an aqueous polyurethane elastomer and a blocked isocyanate crosslinking agent, wherein the amount of the blocked isocyanate crosslinking agent is 5%-20% of the mass of the aqueous polyurethane elastomer, and the thickness of the micro-crosslinked elastic film is 50-100 nm.

[0018] In this invention, the micro-crosslinked elastic membrane and the low-swelling silk fiber form a synergistic effect of "dual regulation in wet and dry states": the micro-crosslinked membrane binds to the fiber through chemical bonds, forming physical constraints on the fiber surface, further reducing the silk swelling rate from 6%-8% to ≤5%. Simultaneously, the elastic membrane maintains an appropriate spacing (0.5-1.0 μm) between fibers during drying, preventing a surge in the coefficient of friction caused by capillary collapse. After the two work synergistically, the wet stiffness is reduced by more than 50%, the dry friction coefficient fluctuation (MMD) drops from 0.15 to below 0.06, and the tactile stability across the entire humidity range is improved by more than 80%, simultaneously resolving the contradictory issues of "wet and cold stiffness" and "dry and itchy sensation."

[0019] As a preferred technical solution of the present invention, the inner layer is hydrophilic treated with a contact angle of 20°-30°; the outer layer is hydrophobic treated, which is applied only to the surface of the outer fiber and does not block the capillary channels between fibers.

[0020] Hydrophilic finishing further reduces the inner layer interfacial resistance, while hydrophobic finishing prevents water backflow, creating a unidirectional moisture-wicking effect. In this invention, the micro-crosslinked elastic membrane and the hydrophilic / hydrophobic partitioning finish form a synergistic effect of dual structural-functional stability: the micro-crosslinked membrane "locks" the hydrophilic and hydrophobic finishing agents onto the fiber surface through chemical bonds, while the membrane itself protects the finishing layer from mechanical wear and water washing damage. After the two work synergistically, the unidirectional transfer index retention rate is >90% after 50 washes (compared to <50% in conventional applications), and the wash resistance is improved by more than 5 times, achieving a breakthrough in functional durability.

[0021] The present invention also provides a method for weaving the above-mentioned silk blended skin-friendly fabric with intelligent humidity regulation function, comprising the following steps: (1) Yarn preparation: The inner layer of synthetic fiber is made into high-twist yarn, and the outer layer of silk fiber is blended with high moisture-absorbing fiber to make low-twist yarn; (2) Weaving: The double-sided weaving process is adopted. The inner layer is woven with honeycomb convex structure, and the outer layer is woven with a combination of plain weave and satin weave. The inner and outer layers are connected by joints. (3) Finishing: The woven fabric is sequentially treated with inner hydrophilic finishing, outer water-repellent finishing, micro-crosslinking elastic finishing and shaping treatment.

[0022] As a preferred technical solution of the present invention, the specific process of the micro-crosslinking elastic finishing is as follows: the fabric is immersed in a finishing solution containing 10-15 g / L of water-based polyurethane elastomer and 1-2 g / L of blocked isocyanate crosslinking agent, dipped and rubbed twice, with a roll-off rate of 70%, and then pre-dried at 120°C and baked at 160°C for 60 seconds.

[0023] As a preferred technical solution of the present invention, the shaping process adopts a segmented low-temperature shaping method, which first performs pre-shrinking shaping at 150°C and a vehicle speed of 30 m / min, and then performs final shaping at 170°C and a vehicle speed of 40 m / min.

[0024] Fabrics prepared using the above method can simultaneously suppress the dual defects of "wet and cold hardening" and "dry and stiff itching" during the complete humidity fluctuation process of "intense sweating → rapid drying", achieving stable touch across the entire humidity range.

[0025] Compared with the prior art, the present invention has the following beneficial effects: This invention, by constructing an "asymmetric wetting gradient structure" and combining fiber selection, yarn design, weaving structure, and micro-crosslinking elastic finishing in a multi-layered synergistic process, simultaneously solves the dual defects of "wet and cold stiffness" and "dry, stiff, and itchy" in silk blended fabrics during the "intense sweating → rapid drying" process. The various technical features produce significant synergistic effects: the triple synergy of high-twist yarn, raised dot structure, and hydrophilic finishing in the inner layer increases the moisture wicking rate by over 120%; the triple synergy of plain / satin weave, alginate blend, and water-repellent finishing in the outer layer forms a complete unidirectional moisture wicking closed loop, increasing moisture wicking efficiency by over 150%; the synergy of the micro-crosslinking elastic membrane and low-swelling silk reduces wet stiffness by 50% and reduces dry friction coefficient fluctuation to below 0.06. This invention also produces unexpected technical effects: physical antibacterial properties with an antibacterial rate of ≥95% after 50 washes can be achieved without antibacterial agents; the humidity-responsive characteristics of the micro-crosslinking membrane give the fabric an adaptive "breathing effect"; and chemical bonding enables functional durability to break through industry bottlenecks, with a retention rate of >90% after 50 washes. The aforementioned synergistic effects and unexpected discoveries together constitute the outstanding substantive features and significant progress of this invention. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall layer structure of the fabric of the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is a schematic diagram of the microstructure of the fiber encapsulated by the micro-crosslinked elastic membrane of the present invention; Figure 4 This is a schematic diagram of the moisture transfer path of the fabric of the present invention.

[0027] 1-Inner layer; 11-Honeycomb-shaped raised dot structure; 12-Raised dot area; 13-Groove area; 2-Outer layer; 21-Plain weave area; 22-Satin weave area; 3-Joining point; Detailed Implementation To make the technical solution and beneficial effects of the present invention clearer, the present invention will be described in detail below with reference to specific embodiments. The following embodiments are for illustrative purposes only and do not constitute a limitation on the scope of protection of the present invention. Equivalent substitutions or modifications made by those skilled in the art based on the content of the present invention are all within the scope of protection of the present invention.

[0028] Example 1 (1) Preparation of fiber raw materials and yarn Inner layer fiber: Modified polyester filament (produced by Jiangsu Hengli Chemical Fiber Co., Ltd.) with a cross-shaped hollow structure is selected. The single fiber linear density is 1.0 dtex, and the fiber bundle consists of 36 monofilaments. The fiber is subjected to low-temperature plasma surface treatment (treatment power 300 W, treatment time 60 s, working gas is oxygen). After treatment, the water absorption swelling rate of the fiber is 2.8% (test method: the diameter change rate is measured after the fiber is immersed in deionized water for 24 h). The above fiber is made into yarn, using an alternating S-twist and Z-twist doubling process, with a twist of 2000 twists / meter, forming a double helix structure yarn.

[0029] Outer layer fibers: Mulberry silk (provided by Zhejiang Silk Technology Co., Ltd., specification 2 / 20 / 22 D) and alginate fiber (produced by Qingdao Mingyue Algae Group Co., Ltd., single fiber linear density 1.5 dtex) are selected. The mulberry silk undergoes degumming treatment, with the degumming rate controlled at 20% (degumming process: sodium carbonate solution concentration 0.5%, temperature 98℃, time 40 min). The degummed mulberry silk and alginate fiber are blended at a mass ratio of 70:30 to form a 60 Nm yarn with a twist of 700 twists / meter, using a weak twist process to maintain fiber fluffiness.

[0030] (2) Weaving process The fabric is woven using an air-jet loom (model: ZAX9100, Tsudakoma Kogyo Co., Ltd.). The warp density is set to 120 ends / cm, and the weft density to 80 ends / cm. The inner layer is woven with a honeycomb-shaped raised dot structure, with 8×8 stitches per repeat unit, and the raised dots are arranged in a diamond pattern. The height of the raised dots is 0.4 mm (controlled by adjusting the warp feed and weft tension), the width of the groove between the raised dots is 0.25 mm, and the spacing between the raised dots is 2 stitches apart in the weft direction and 2 stitches apart in the longitudinal direction. The raised areas are formed by the inner layer yarns using a 3 / 3 twill weave, with a raised dot density of approximately 25 dots / cm².

[0031] The outer layer is woven with a combination of plain and satin weave. The plain weave area uses a one-up-one-down interweave, while the satin weave area uses a 5-end satin variation (with 5 floats). The plain and satin weave areas are distributed alternately in a checkerboard pattern, with an area ratio of 6:4 (60% plain weave and 40% satin weave). The warp widths of the plain weave and satin weave areas are 0.5 mm and 0.33 mm, respectively, and the weft widths are 0.5 mm and 0.33 mm, respectively.

[0032] The inner and outer layers are connected by joints. Each joint is located at the center of every four convex point cycles, meaning one joint is placed every eight warp yarns along the warp direction and every eight weft yarns along the weft direction. At the joint, the inner layer yarns act as the joint yarns, interweaving with the outer layer's weave. The interweaving density of the inner layer yarns at the joint is one interweaving every two warp yarns in the warp direction and every two weft yarns in the weft direction in the joint area.

[0033] (3) Finishing process Hydrophilic finishing: A magnetron-controlled roller single-sided finishing machine (model: Monforts Mat-O-Lab) was used to lay the fabric flat with the inner layer (1) facing upwards. The hydrophilic finishing liquid was precisely coated onto the surface of the inner layer using a gravure roller, with the coating amount controlled at 15 g / m², and the roller speed synchronized with the fabric speed (20 m / min). Immediately after coating, the fabric was placed in an infrared preheating zone (temperature 80℃, time 10 s) for pre-drying to prevent the finishing liquid from penetrating to the back of the inner layer. Subsequently, the fabric was placed in an oven (100℃, 2 min) for complete drying.

[0034] Water-repellent finishing: The fabric that has undergone hydrophilic finishing and drying is turned over so that the outer layer (2) faces upward. A high-pressure micro-atomization spraying system (nozzle diameter 0.2 mm, spray pressure 0.4 MPa, nozzle distance from fabric 15 cm) is used to evenly spray the water-repellent finishing liquid onto the outer layer surface at a spraying rate of 20 g / m². Immediately after spraying, it is dried by hot air penetration (top and bottom nozzle temperature 130℃, wind speed 15 m / s, time 30 s) to ensure that the finishing liquid is quickly fixed on the surface of the outer fiber layer and does not migrate to the inner layer.

[0035] Micro-crosslinked elastic finishing: The fabric treated as described above was immersed in a finishing solution composed of: 12 g / L of waterborne polyurethane elastomer (Impranil® DL 1380, Covestro), 1.5 g / L of blocked isocyanate crosslinking agent (Desmodur® BL 5375, Covestro), and the remainder being deionized water. A two-dip, two-nip process was used, with a nip rate of 70%, an immersion temperature of 25°C, and an immersion time of 5 min. Subsequently, it was pre-dried at 120°C for 60 s and then baked at 160°C for 60 s. After treatment, a micro-crosslinked elastic film was formed on the fiber surface, with a film thickness of 80 nm (measured by transmission electron microscopy, using the average value of 10 different fiber cross-sections).

[0036] Shaping process: A segmented low-temperature shaping process is adopted. The first segment: temperature 150℃, speed 30 m / min, for pre-shrinking and shaping; the second segment: temperature 170℃, speed 40 m / min, for final shaping. The shaping equipment is a tenter frame (model: MONFORTS 328).

[0037] Example 2 It is basically the same as Example 1, except that: The inner cross-shaped hollow modified polyester monofiber has a linear density of 0.8 dtex and a water absorption swelling rate of 2.5%. The outer silk degumming rate is 18%, and the alginate fiber blend ratio is 70:30; The inner layer yarn has a twist of 1800 twists / meter, and the outer layer yarn has a twist of 600 twists / meter. The height of the protrusion is 0.3 mm, and the width of the groove is 0.2 mm; In the micro-crosslinked elastic finishing process, the polyurethane concentration was 10 g / L, the crosslinking agent concentration was 1 g / L, and the film thickness was 65 nm. After hydrophilic finishing, the inner layer has a contact angle of 28°, and after hydrophobic finishing, the outer layer has a contact angle of 128°.

[0038] Example 3 It is basically the same as Example 1, except that: The inner cross-shaped hollow modified polyester monofiber has a linear density of 1.2 dtex and a water absorption swelling rate of 3.0%. The outer silk degumming rate is 22%, and the alginate fiber blend ratio is 70:30; The inner layer yarn has a twist of 2200 twists / meter, and the outer layer yarn has a twist of 800 twists / meter. The height of the protrusion is 0.5 mm, and the width of the groove is 0.3 mm; In the micro-crosslinked elastic finishing process, the polyurethane concentration was 15 g / L, the crosslinking agent concentration was 2 g / L, and the film thickness was 95 nm. After hydrophilic finishing, the inner layer has a contact angle of 22°, and after hydrophobic finishing, the outer layer has a contact angle of 122°.

[0039] Comparative Example 1 A double-layer, unidirectional moisture-wicking textured fabric was prepared according to the method of Example 1 in Chinese Patent CN104264348A. The moisture-wicking layer (inner layer) was woven from a mixture of polyester profiled yarn (monofilament linear density 0.174 tex) and nylon profiled yarn (monofilament linear density 0.162 tex), with a raised dot height of 0.1 mm. The evaporation layer (outer layer) was woven weft-knitted from polyester profiled yarn (monofilament linear density 0.083 tex). No silk fibers were used, no micro-crosslinking elastic finishing was performed, and no hydrophilic / water-repellent partitioning was applied. Specific weaving and finishing parameters were performed according to Example 1 of that patent.

[0040] Comparative Example 2 Following conventional methods for preparing silk blended fabrics, ordinary mulberry silk (28% degumming rate) was blended with round cross-section polyester (1.0 dtex single fiber linear density) at a mass ratio of 50:50 to form a 60 Nm yarn. The yarn was woven in a plain weave with a warp density of 120 ends / cm and a weft density of 80 ends / cm. The finishing process employed conventional hydrophilic softening treatment: impregnation with hydrophilic silicone oil (10 g / L concentration), two dips and two nips, and drying at 120℃. No double-layer structure design, no raised dot structure, no micro-crosslinking elastic finishing, and no hydrophilic / water-repellent zone finishing were used.

[0041] Comparative Example 3 It is basically the same as Example 1, except that: micro-crosslinking elastic finishing is not performed, and the other steps are the same.

[0042] Comparative Example 4 The process is basically the same as in Example 1, except that the outer silk layer uses a conventional degumming rate of 28% (without degumming control of 18%-22%), but retains micro-crosslinking elastic finishing, and the rest of the steps are the same.

[0043] Performance Tests and Results Test method: 1. Stiffness Test: Using the KES Fabric Stiffness Tester (KES-FB2, Kato Technology Co., Ltd.), the bending stiffness of the fabric was tested at 80% moisture content (wet state) and 8% moisture content (dry state), in cN·cm. Stiffness change rate = (wet stiffness - dry stiffness) / dry stiffness × 100%.

[0044] 2. Friction coefficient test: Using the KES fabric style meter (KES-FB4), the dynamic friction coefficient MMD (fluctuation range of average friction coefficient) of the inner surface of the fabric was tested at moisture contents of 80% and 8%, which is dimensionless.

[0045] 3. Unidirectional moisture transfer test: According to AATCC 195 standard, use MMT (Liquid Moisture Management Tester) to test the unidirectional transfer index R (dimensionless) and the liquid water dynamic transfer index (dimensionless).

[0046] 4. Antibacterial Performance Test: Following AATCC 100 standard, the fabric's inhibition rate (%) against Staphylococcus aureus (ATCC 6538) after 50 washes was tested. The washing method followed AATCC 135 standard, using standard detergent, water temperature 40℃, washing time 12 min, rinsing twice, spin-drying, and repeating the above cycle to the specified number of cycles.

[0047] 5. Washability test: Test the one-way transfer index R after 0, 10, 30 and 50 washes respectively, and calculate the retention rate (%) = (R value after washing / initial R value) × 100%.

[0048] 6. Air permeability test: The air permeability (mm / s) of the fabric was tested according to ASTM D737 standard under conditions of relative humidity of 40% and 80%.

[0049] 7. Vapor absorption speed test: According to AATCC 197 standard, the vertical wicking speed (cm / min) of the fabric is tested under relative humidity conditions of 40% and 80%.

[0050] 8. Dynamic Humidity Cycle Test: Simulating the human body's "intense sweating → rapid drying" humidity fluctuation scenario, a dynamic humidity cycle tester was used. The temperature was set at 30℃, and the humidity cycled from 30%RH (dry state) → 90%RH (wet state) → 30%RH (dry state) for 60 minutes per cycle. The fabric stiffness change rate, friction coefficient fluctuation MMD, unidirectional transmission index R retention rate, breathability stability coefficient, and wicking speed retention rate were tested after 10 and 50 cycles. Retention rate (%) = (index value after cycle / initial index value) × 100%; stability coefficient (%) = index fluctuation amplitude after cycle / initial index fluctuation amplitude × 100%.

[0051] Test results: Table 1 Results of routine performance tests

[0052] Table 2 Results of Dynamic Humidity Cyclic Test

[0053] Results analysis: Compared with Comparative Example 1 (CN104264348A), the stiffness change rate of Examples 1-3 (8.0%-9.1%) was significantly lower than that of Comparative Example 1 (28.0%), indicating that the present invention has a significant improvement in dry and wet tactile stability. Compared with Comparative Example 2 (conventional silk blend), the stiffness change rate of Examples 1-3 was reduced by approximately 78%-81%, and the MMD fluctuation value was reduced by approximately 43%.

[0054] In terms of unidirectional moisture wicking performance, the unidirectional transfer index R (0.85-0.91) and liquid water dynamic transfer index (0.88-0.94) of Examples 1-3 are significantly higher than those of Comparative Example 1 (0.62 and 0.71) and Comparative Example 2 (0.35 and 0.52), indicating that the present invention achieves a more efficient unidirectional moisture wicking effect.

[0055] Synergistic Effect Verification: To further verify the synergistic effect of "low degumming rate" and "micro-crosslinked elastic finishing" in this invention, Comparative Example 3 (without micro-crosslinked elastic finishing) and Comparative Example 4 (conventional degumming rate of 28%) were added. The test results are shown in the table: Using low degumming rate alone (Comparative Example 3) can reduce the wet swelling rate of silk fibers to 7.2%, but the wet stiffness is still 3.5 cN·cm, higher than 2.1 cN·cm in Example 1; using micro-crosslinked membrane alone without controlling the degumming rate (Comparative Example 4) has limited effect on swelling rate suppression (9.8%), and the wet stiffness is as high as 4.0 cN·cm; while the synergy of the two (Example 1) produced an unexpectedly significant effect, reducing the swelling rate to 4.5% and the wet stiffness to 2.1 cN·cm, which is far superior to either measure alone. This result clearly demonstrates that there is a significant synergistic effect between low degumming rate treatment and micro-crosslinked elastic membrane, which is the key to achieving stable tactile feel across the entire humidity range.

[0056] Regarding antibacterial properties, the antibacterial rate of Examples 1-3 was ≥95% after 50 washes, while the antibacterial rates of Comparative Examples 1 and 2 were only 32% and 28%, respectively. Since the fabric of this invention does not contain any antibacterial finishing agents, the antibacterial effect comes from the dry microenvironment formed by the rapid moisture wicking and evaporation of the fabric (MMT test showed that the liquid water dynamic transfer index was ≥0.88), indicating that the moisture retention time on the fabric surface is short and the humidity of the skin surface microenvironment is low, which is not conducive to bacterial growth.

[0057] Regarding wash resistance, Examples 1-3 maintained a unidirectional transfer index of ≥90% after 50 washes, while Comparative Example 1's retention rate dropped to 32% after 30 washes, and Comparative Example 2's retention rate dropped to 25% after 30 washes. This indicates that the micro-crosslinked elastic membrane effectively protects the hydrophilic and hydrophobic finishing layers through chemical bonding.

[0058] Regarding the response to environmental humidity, in Examples 1-3, the air permeability increased by approximately 41%-45% when the relative humidity decreased from 80% to 40%, and the wicking speed increased by approximately 67%-82% at 80% relative humidity compared to 40%. In contrast, the air permeability and wicking speed of Comparative Examples 1 and 2 showed smaller changes with humidity (change rate <10%). These results indicate that the fabric of the present invention exhibits significantly different air permeability and wicking speed under different static humidity conditions, suggesting that the micro-crosslinked elastic membrane plays a regulatory role in the humidity response. Further washability tests (maintaining over 90% unidirectional moisture wicking function after 50 washes) indirectly demonstrate that the micro-crosslinked membrane has good structural stability and can withstand multiple humidity cycles without failure.

[0059] Dynamic humidity cycle performance analysis: After 50 dynamic humidity cycles, the stiffness change rate of Examples 1-3 of this invention was only 8.5%-10.2%, and the dry MMD fluctuation value was ≤0.05, which is far better than Comparative Examples 1 and 2. This shows that the fabric can still effectively suppress the defects of "wet and cold hardening" and "dry, hard and itchy" under the dynamic humidity environment of repeated dry and wet alternation, and has excellent tactile stability. After 50 cycles, the unidirectional transmission index R retention rate of Examples 1-3 was ≥91%, the air permeability stability coefficient was ≥92%, and the wicking speed retention rate was ≥89%, while the indicators of Comparative Examples 1 and 2 decreased significantly. This fully proves that the synergistic effect of micro-crosslinked elastic finishing and low degummed silk can make the fabric structurally intact and functionally unaffected under dynamic humidity impact, and has excellent dynamic humidity adaptive adjustment capability and long-term durability.

[0060] Working principle Combination Figures 1 to 4 The working principle of the fabric of the present invention to achieve intelligent humidity regulation during wearing is as follows: When the body begins to sweat, the sweat first comes into contact with the skin-contacting surface of the inner layer 1. The surface of the inner layer 1 has a honeycomb-like textured surface 11, where the raised points 12 form point contact with the skin, reducing the contact area between the skin and the fabric when wet. The sweat is rapidly absorbed through the moisture-wicking channels formed by the grooves 13 between the raised points, by the wicking effect generated by the high-twist yarn (1800-2200 twists / meter) of the inner layer 1. Simultaneously, the contact angle of the inner layer 1, after hydrophilic finishing, is 20°-30°, reducing interfacial resistance and allowing sweat to quickly penetrate the fiber interior. The synergistic effect of this triple structure (raised points, high-twist yarn, and hydrophilic finishing) results in a shorter time that sweat remains on the skin surface, thus reducing the "cold and damp" feeling.

[0061] After sweat enters the inner layer 1, it is transferred to the outer layer 2 through the junction area 3. The outer layer 2 is formed by a blend of silk fibers and alginate fibers. The plain weave area 21 utilizes the capillary effect generated by dense interweaving to rapidly diffuse moisture laterally along the weft direction, avoiding local moisture accumulation. The alginate fibers (moisture regain >12%) absorb some moisture, forming a "buffer pool" to prevent oversaturation. The satin weave area 22, due to its longer float length and lower yarn coverage coefficient, forms breathable micropores, accelerating moisture evaporation. The outer side of the outer layer 2 is treated with a water-repellent finish with a contact angle ≥122° to prevent moisture absorbed by the outer layer from seeping back into the inner layer 1, forming a one-way moisture-wicking closed loop.

[0062] During humidity fluctuations, the micro-crosslinked elastic membrane coats the surface of all fibers, playing a dual regulatory role: In a wet state, the micro-crosslinked elastic membrane absorbs a small amount of moisture and undergoes slight expansion (thickness increases by 10%-20%), while simultaneously physically constraining the internal silk fibers, further limiting the swelling rate of the silk fibers from 6%-8% to below 5%, thereby inhibiting the "caking" phenomenon caused by excessive fiber expansion; In a dry state, the micro-crosslinked elastic membrane shrinks and recovers, maintaining an appropriate spacing between fibers (0.5-1.0 μm), avoiding a surge in the coefficient of friction caused by capillary collapse, thereby inhibiting the "dry, hard, and itchy" phenomenon.

[0063] Furthermore, the micro-crosslinked elastic membrane fixes hydrophilic and water-repellent finishing agents to the fiber surface through chemical bonds (covalent bonds formed between polyurethane and the hydroxyl and amino groups of the fiber). Simultaneously, the membrane itself possesses certain hydrolysis and heat resistance, enabling it to resist mechanical forces, temperature, and chemical erosion during washing, thereby improving the durability of the functional finishing. The humidity-responsive characteristics of the micro-crosslinked elastic membrane also allow the fabric to automatically adjust the size of the gaps between fibers under different ambient humidity levels: the membrane shrinks under low humidity, increasing air permeability; under high humidity, the membrane slightly expands, reducing the capillary radius and increasing wicking speed, achieving adaptive adjustment.

[0064] Industrial application verification After the fabric of the present invention was prepared according to Example 1, its application performance was verified by a third-party testing institution (National Textile Products Quality Supervision and Inspection Center). The specific verification items and results are as follows: 1. Subjective evaluation of wearing comfort Thirty healthy volunteers (15 men and 15 women, aged 25-55 years) were selected and engaged in 30 minutes of moderate-intensity exercise (6 km / h on a treadmill) at an ambient temperature of 28°C and a relative humidity of 65%. After exercise, they rested for 30 minutes in an air-conditioned room at 22°C and a relative humidity of 50%. Volunteers wore underwear made of the fabric of Example 1 (experimental group) and the same underwear made of the fabric of Comparative Example 1 (control group). Subjective evaluation was conducted using a double-blind method (score range 1-5, with 5 being the best).

[0065]

[0066] The results show that the fabric of the present invention exhibits significantly lower levels of dampness, coldness, and itchiness compared to the fabric of Comparative Example 1 during intense sweating and subsequent rapid drying, resulting in a higher overall comfort rating.

[0067] 2. Verification of adaptability to actual production The weaving method and finishing process of Example 1 were pilot-scale verified in a textile enterprise in Jiangsu Province. Using an air-jet loom (ZAX9100), 1000 meters of fabric were continuously produced, achieving a weaving efficiency of 92% (compared to approximately 85% for conventional double-layer fabrics), with a downtime rate of 2.5 times / hour (compared to approximately 4 times / hour for conventional double-layer fabrics), indicating that the weaving process of this invention has good production adaptability. In the finishing process, the first-pass success rate (fabric performance compliance rate) for micro-crosslinking elastic finishing was 96%, and the first-pass success rate for conventional functional finishing was approximately 85%. The pilot-scale verification shows that the technical solution of this invention is feasible for industrial-scale mass production.

[0068] 3. Product application verification The fabric from Example 1 was made into the following three types of products, and their applications were verified: Product A: High-end sports casual T-shirt (Brand: Prototype Sample). Twenty golf enthusiasts tried it on for two weeks. Feedback questionnaires showed that: 18 felt it "didn't stick to the body after sweating," 17 felt it "didn't stiffen after drying," and 16 felt "there was no significant decrease in function after 5 washes." The overall satisfaction rate was 85%.

[0069] Product B: Menopausal hot flash loungewear (10 sets produced). Ten female subjects aged 45-55 wore the garments continuously for one month, and their sweating during hot flashes was recorded. Subjects self-rated the fabric's "damp and cold feeling" after sweating from hot flashes as 1.5±0.6 (out of 5 being the coldest), compared to 3.8±0.9 when wearing pure cotton loungewear previously. Nine subjects indicated they would purchase the product.

[0070] Product C: Infant and toddler underwear (20 pieces produced for trial use, sizes 90-110). Twenty parents of infants and toddlers aged 2-4 years used the product continuously for two weeks, recording performance changes before and after washing. Parent feedback: After 10 washes, the fabric maintained good softness and moisture-wicking properties, with no pilling or fuzzing; infants and toddlers experienced no rashes or allergic reactions. Antibacterial performance testing showed a 97.2% inhibition rate against Staphylococcus aureus after 10 washes.

[0071] The above application verification results show that the fabric of the present invention can effectively suppress the dual defects of "wet and cold hardening" and "dry, hard and itchy" in actual wearing scenarios, and has good functional durability and biosafety. It is suitable for promotion and application in high-end sports and leisure, functional clothing for specific groups and children's clothing.

[0072] In summary, the silk blended skin-friendly fabric with intelligent humidity regulation function and its weaving method provided by this invention achieve tactile stability across the entire humidity range under severe humidity fluctuations through the synergistic effect of asymmetric wetting gradient structure and micro-crosslinked elastic finishing. It also has excellent antibacterial properties, washability, and adaptive regulation performance, and has good industrial applicability.

Claims

1. A silk blended skin-friendly fabric with intelligent humidity regulation function, characterized in that, include: The inner layer (1) is formed of synthetic fibers with high moisture wicking and low water absorption and swelling. The skin-contact surface of the inner layer is provided with honeycomb-shaped protrusions (11). The honeycomb-shaped protrusions (11) consists of protrusions (12) and grooves (13). The protrusions (12) form point contact with the skin, and the grooves (13) form moisture-wicking channels. The outer layer (2) is formed by a blend of silk fibers and highly absorbent fibers. The outer layer is a combination of plain weave area (21) and satin weave area (22), which are alternately distributed. The inner layer (1) and the outer layer (2) are connected by a connection point (3) to form a double-layer structure; Furthermore, the fabric undergoes a micro-crosslinking elastic finishing process, forming a micro-crosslinking elastic film on the fiber surface. This micro-crosslinking elastic film limits excessive swelling of the silk fibers when they absorb moisture and maintains a low coefficient of friction between fibers during drying.

2. The silk blended skin-friendly fabric with intelligent humidity regulation function according to claim 1, characterized in that, The inner layer (1) is made of modified polyester filament with a cross-shaped hollow structure, and the single fiber linear density is 0.8-1.2 dtex, with a water absorption swelling rate ≤3%.

3. The silk blended skin-friendly fabric with intelligent humidity regulation function according to claim 1, characterized in that, The degumming rate of the silk fiber in the outer layer (2) is 18%-22%, the highly absorbent fiber is alginate fiber, and the blending mass ratio of the silk fiber and alginate fiber is 70:

30.

4. The silk blended skin-friendly fabric with intelligent humidity regulation function according to claim 1, characterized in that, The inner layer (1) is made of high-twist yarn with a twist of 1800-2200 twists / meter, and the outer layer (2) is made of low-twist yarn with a twist of 600-800 twists / meter.

5. The silk blended skin-friendly fabric with intelligent humidity regulation function according to claim 1, characterized in that, The height of the protrusions (12) of the honeycomb protrusion tissue (11) is 0.3-0.5 mm, the width of the groove (13) is 0.2-0.3 mm, and the protrusions (12) are arranged in a circular or rhomboid shape.

6. The silk blended skin-friendly fabric with intelligent humidity regulation function according to claim 1, characterized in that, The micro-crosslinked elastic finishing process uses a water-based polyurethane elastomer and a blocked isocyanate crosslinking agent. The amount of the blocked isocyanate crosslinking agent is 5%-20% of the mass of the water-based polyurethane elastomer, and the thickness of the micro-crosslinked elastic film is 50-100 nm.

7. The silk blended skin-friendly fabric with intelligent humidity regulation function according to claim 1, characterized in that, The inner layer (1) is hydrophilic and has a contact angle of 20°-30°; the outer layer (2) is hydrophobic and has a contact angle of ≥120° on the outer surface. The hydrophobic treatment is applied only to the surface of the outer fiber and does not block the capillary channels between fibers.

8. A method for weaving a silk blended skin-friendly fabric with intelligent humidity regulation function as described in any one of claims 1-7, characterized in that, Includes the following steps: (1) Yarn preparation: The inner layer (1) synthetic fiber is made into high twist yarn, and the outer layer (2) silk fiber is blended with high moisture absorption fiber to make low twist yarn; (2) Weaving: The double-sided weaving process is adopted. The inner layer (1) is woven with a honeycomb-shaped raised dot structure (11), and the outer layer (2) is woven with a combination of plain weave area (21) and satin weave area (22). The inner and outer layers are connected by the joint point (3). (3) Finishing: The woven fabric is sequentially treated with inner layer (1) hydrophilic finishing, outer layer (2) water-repellent finishing, micro-crosslinking elastic finishing and shaping treatment.

9. The weaving method according to claim 8, characterized in that, The specific process of the micro-crosslinked elastic finishing is as follows: the fabric is immersed in a finishing solution containing 10-15 g / L of water-based polyurethane elastomer and 1-2 g / L of blocked isocyanate crosslinking agent, and then dipped and rubbed twice with a roll-off rate of 70%. It is then pre-dried at 120°C and baked at 160°C for 60 seconds.

10. The weaving method according to claim 8, characterized in that, The shaping process adopts a segmented low-temperature shaping method, first pre-shrinking and shaping at 150℃ and 30 m / min, and then final shaping at 170℃ and 40 m / min.

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