Tencel and chinlon blended skin-friendly fabric and preparation method thereof

Abstract

The invention discloses a tencel and chinlon blended skin-friendly fabric and a preparation method, and relates to the technical field of fabrics, the tencel and chinlon blended skin-friendly fabric comprises an upper layer fabric and a lower layer fabric; the upper-layer fabric and the lower-layer fabric are both blended fabrics of tencel and graphene modified chinlon, and the weight ratio of the tencel to the graphene modified chinlon is (60-70): (30-40); a spacing fiber layer is arranged between the upper-layer fabric and the lower-layer fabric, and the two ends of the spacing fiber layer are in woven connection with the upper-layer fabric and the lower-layer fabric respectively; the blended fabric is formed by weaving warp-wise composite yarn and weft-wise composite yarn, and the weight ratio of the warp-wise composite yarn to the weft-wise composite yarn is 1: (2-2.5). A double-layer interval structure and a multifunctional composite yarn technology are combined, the three-dimensional elastic effect which cannot be achieved by a traditional single-layer fabric is achieved, the interval fiber layer forms elastic supporting columns between the upper-layer fabric and the lower-layer fabric, and the elastic supporting columns and the elastic characteristics of warp and weft composite yarns have a synergistic effect, so that the elasticity of the fabric is improved. And a complete three-way elastic system is constructed.

Description

Technical Field

[0001] This invention relates to the field of fabric technology, and in particular to a skin-friendly fabric made of Tencel and nylon blend and its preparation method. Background Technology

[0002] As people's demands for comfort and functionality in clothing continue to increase, fabrics with multiple functions such as warmth, breathability, and elasticity have become a research and development hotspot. Currently, various technical solutions for warm fabrics have emerged on the market.

[0003] Authorization announcement number CN108608706B discloses an elastic thermal fabric with a three-layer composite structure, including a windproof outer layer, a heat-generating fiber inner layer, and a sweat-absorbing filling layer. The sweat-absorbing filling layer is located between the windproof outer layer and the heat-generating fiber inner layer. The heat-generating fiber inner layer is S-shaped folded and has an elastic band in the middle for elasticity. To balance windproof and breathability, the technology incorporates recessed semi-circular ventilation holes at the top of the windproof outer layer, with fiber pile arranged at the bottom inside the ventilation holes.

[0004] The heating function of this technology is mainly achieved through specially made heating fibers. The heating fibers are prepared by dissolving far-infrared ceramic powder in water, then adding polyacrylonitrile (PAC) to mix the PAC and PAC at a specific mass ratio. The mixture is then heated in a water bath under ultrasonic conditions, causing the PAC to react with calcium hydroxide to obtain multiple water-absorbing groups. After precipitation and drying, a hydrolyzed PAC material is obtained. This material is further mixed with acrylamine in dimethylformamide solvent to form a co-solution. The heating fibers are then finally produced through processes such as spinning, drawing, and spraying.

[0005] Although the above-mentioned technical solutions have achieved a combination of warmth, breathability and elasticity to a certain extent, there are still some technical limitations in practical applications: the functional layers are mainly fixed by adhesives, which may lead to separation between layers after long-term use; although the S-shaped folded heating fiber inner layer provides a certain degree of elasticity, the elastic recovery and durability of the overall structure need to be improved; in addition, there is still room for improvement in the precise control of temperature regulation performance and the synergistic effect of multiple functions in the existing three-layer structure. Summary of the Invention

[0006] In view of the problems existing in the current Tencel and nylon blended skin-friendly fabrics and their preparation methods, this invention is proposed.

[0007] Therefore, the problem that this invention aims to solve is that existing Tencel-nylon blended fabrics lack elasticity in the thickness direction and cannot provide three-dimensional elastic support.

[0008] To solve the above-mentioned technical problems, the present invention provides the following technical solution: This invention provides a skin-friendly fabric blended with Tencel and nylon, comprising an upper fabric and a lower fabric; a spacer fiber layer is provided between the upper and lower fabrics, with both ends of the spacer fiber layer woven and connected to the upper and lower fabrics respectively; the blended fabric is woven from warp composite yarns and weft composite yarns, with a weight ratio of warp composite yarns to weft composite yarns of 1:2~2.5; a phase change temperature regulating fiber layer is provided on the surface of the upper fabric, and the phase change temperature regulating fiber layer is implanted into the surface of the upper fabric in a wave-like distribution; the wavelength of the phase change temperature regulating fiber layer is 15~20mm, the amplitude is 1~6mm, and the phase change temperature regulating fiber layer is made of polyester fiber containing paraffin microcapsules with a microcapsule diameter of 2~5μm.

[0009] As a preferred embodiment of the Tencel and nylon blended skin-friendly fabric of the present invention, wherein: the spacer fiber layer is an elastic polyurethane monofilament; the spacing height of the spacer fiber layer is 3~8mm, and the distribution density is 20~40 fibers / cm. 2 The spacer fiber layers are evenly distributed or regularly arrayed. The connection between the spacer fiber layers and the upper and lower fabrics is either warp-knitted or weft-knitted. The spacer fiber layers are interwoven between the upper and lower fabrics with a preset tension during weaving. Both the upper and lower fabrics are blended fabrics of Tencel and graphene-modified nylon, with a weight ratio of 60~70:30~40 between Tencel and graphene-modified nylon.

[0010] The beneficial effects of this preferred technical solution are as follows: By using elastic polyurethane monofilaments as spacer fiber layers and setting specific spacing heights and distribution densities, an elastic support structure can be formed in the fabric thickness direction, achieving a three-dimensional elastic effect. When the fabric is subjected to pressure, the spacer fiber layers undergo elastic deformation and generate restoring force, effectively preventing fabric collapse and improving the fabric's three-dimensional shape retention and wearing comfort. Simultaneously, the spacer structure increases the air layer inside the fabric, enhancing warmth retention and breathability.

[0011] As a preferred embodiment of the Tencel and nylon blended skin-friendly fabric of the present invention, the warp and weft composite yarns both adopt a four-layer covering structure, including a core layer, a first covering layer, a second covering layer, and an outer layer; wherein, the core layer is graphene-modified nylon yarn, the first covering layer is nano-silver Tencel fiber, the second covering layer is phase change microcapsule Tencel fiber, and the outer layer is antibacterial Tencel fiber; the graphene-modified nylon yarn of the core layer is 120D / 36F DTY yarn, the nano-silver Tencel fiber of the first covering layer is 32 count, the phase change microcapsule Tencel fiber of the second covering layer is 28 count, and the antibacterial Tencel fiber of the outer layer is 36 count.

[0012] The beneficial effects of this preferred technical solution are: the layered design ensures the independence and synergy of each functional layer and avoids mutual interference between functions.

[0013] As a preferred embodiment of the Tencel and nylon blended skin-friendly fabric of the present invention, the warp composite yarn adopts a twisting method of first Z twist and then S twist, with the first Z twist being 200 twists / meter and the second S twist being 160 twists / meter; the weft composite yarn adopts a twisting method of first S twist and then Z twist, with the first S twist being 240 twists / meter and the second Z twist being 180 twists / meter; the warp composite yarn specification is 110 / 3 and the weft composite yarn specification is 135 / 3.

[0014] The beneficial effects of this preferred technical solution are as follows: by adopting differentiated twisting methods of Z-twist followed by S-twist and S-twist followed by Z-twist, the warp and weft yarns have different twist characteristics, which enhances the three-dimensionality and elastic recovery ability of the fabric. Different twist configurations optimize the balance between the strength and softness of the yarn, improve the durability and hand feel of the fabric, and the different yarn specifications in the warp and weft directions further enhance the anisotropic elasticity of the fabric.

[0015] As a preferred embodiment of the Tencel and nylon blended skin-friendly fabric of the present invention, the phase change temperature regulating fiber layer is distributed in a spiral gradient waveform, with a spiral period of 15~20mm, a gradient amplitude of 1~6mm, and a spiral angle of 30~45°.

[0016] The beneficial effects of this preferred technical solution are as follows: Compared with a simple waveform distribution, the spiral gradient waveform distribution can provide a more uniform temperature regulation effect and better visual aesthetics. The spiral structure increases the effective distribution length of the phase change material, and the gradient amplitude design makes the temperature regulation effect smoother and more stable, avoiding local temperature changes and improving the wearing comfort experience.

[0017] As a preferred embodiment of the Tencel and nylon blended skin-friendly fabric of the present invention, wherein: the linear density of the phase change temperature regulating fiber layer is 15~20 tex, and the microcapsule wall thickness of the paraffin microcapsules is 0.1~0.3 μm.

[0018] The beneficial effects of this preferred technical solution are: by controlling the linear density of the phase change temperature-regulating fiber layer and the microcapsule wall thickness, the content and release rate of the phase change material are optimized.

[0019] As a preferred embodiment of the Tencel and nylon blended skin-friendly fabric of the present invention, wherein: the graphene-modified nylon filament tension of the core layer is 35~40cN, the wrapping angle of the first covering layer is 35~45°, the wrapping angle of the second covering layer is 55~65°, and the wrapping angle of the outer layer is 75~85°.

[0020] As a preferred embodiment of the Tencel and nylon blended skin-friendly fabric of the present invention, the lower layer fabric is impregnated with a chitosan solution at a concentration of 1~3g / L, at a temperature of 40~60℃, and for a time of 30~60 minutes.

[0021] The beneficial effects of this preferred technical solution are as follows: the chitosan solution impregnation treatment improves the skin-friendly properties of the underlying fabric. Chitosan has natural antibacterial, moisturizing and biocompatibility properties, which can reduce skin irritation and provide a better skin contact experience.

[0022] This invention provides a method for preparing a skin-friendly fabric, wherein the skin-friendly fabric is prepared using a segmented setting process, specifically including: a first segment temperature of 175°C for 2 minutes; a second segment temperature of 150°C for 4 minutes; a third segment temperature of 125°C for 10 minutes; and a fourth segment temperature of 105°C for 6 minutes.

[0023] The beneficial effects of this preferred technical solution are as follows: the segmented shaping process, through gradient cooling treatment, can maintain the three-dimensional structure and functional characteristics of the fabric to the greatest extent. The high-temperature section fixes the fiber morphology, the medium-temperature section stabilizes the spacing structure, and the low-temperature section relieves internal stress, ensuring the dimensional stability of the fabric while maintaining good elasticity and hand feel.

[0024] The beneficial effects of this invention are: 1. By combining a double-layer spacer structure with multifunctional composite yarn technology, a three-dimensional elastic effect unattainable by traditional single-layer fabrics is achieved. The spacer fiber layer forms an elastic support column between the upper and lower fabric layers, working synergistically with the elastic properties of the warp and weft composite yarns to construct a complete three-dimensional elastic system. This three-dimensional elastic structure not only provides cushioning protection in the thickness direction, but more importantly, adds a three-dimensional elastic response on top of the warp and weft elasticity. This allows the fabric to achieve coordinated deformation and recovery when subjected to external forces in multiple directions, providing a superior three-dimensional comfort compared to traditional planar elasticity.

[0025] 2. The space between the phase change temperature-regulating fiber layer of the upper fabric and the lower fabric forms a unique microclimate regulation system. The heat absorption and release process of the phase change temperature-regulating fiber layer and the airflow of the spacer layer promote each other, achieving more efficient and uniform temperature regulation. The spacer fiber layer not only provides physical support but also acts as a bridge for heat conduction, allowing the phase change process to proceed uniformly throughout the entire fabric thickness range, avoiding the local overheating or undercooling phenomena that are prone to occur in traditional phase change fabrics.

[0026] 3. The spirally distributed, gradually varying waveform of the phase change temperature-regulating fiber layer, combined with the three-dimensional space of the spacer structure, forms a unique heat distribution network. The spiral shape increases the effective action path of the phase change material, while the gradual design allows heat to be transferred smoothly within the three-dimensional space. Combined with the thermally conductive bridging effect of the spacer fiber layer, this achieves precise and stable temperature regulation. This three-dimensional thermal regulation can provide differentiated responses based on the temperature requirements of different parts of the body, offering a personalized microclimate environment. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a diagram showing the spiral gradient waveform distribution structure of a skin-friendly fabric made of Tencel and nylon blend, according to an embodiment of the present invention.

[0029] Figure 2 This is a comparison diagram of different distribution patterns of a skin-friendly fabric made of Tencel and nylon blend, according to an embodiment of the present invention.

[0030] Figure 3 This is a waveform diagram of the stress analysis curve of a skin-friendly fabric made of Tencel and nylon blend, according to an embodiment of the present invention. Detailed Implementation

[0031] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, a detailed description is provided below in conjunction with specific embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0032] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0033] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0034] Example 1: This example provides a skin-friendly fabric made of Tencel and nylon blend, including an upper fabric and a lower fabric. Both the upper and lower fabrics are blended fabrics of Tencel and graphene-modified nylon, with a weight ratio of 60:40 between Tencel and graphene-modified nylon. A spacer fiber layer is provided between the upper fabric and the lower fabric, and the two ends of the spacer fiber layer are woven and connected to the upper fabric and the lower fabric respectively. Blended fabrics are woven from warp composite yarns and weft composite yarns, with a weight ratio of 1:2 between the warp composite yarns and the weft composite yarns.

[0035] The spacer fiber layer is made of elastic polyurethane monofilament; the spacing height of the spacer fiber layer is 3 mm, and the distribution density is 40 fibers / cm. 2 They are arranged in a regular array, and the connection between the interlayer fiber and the upper and lower fabrics is warp knitting. The spacer fiber layer is interwoven between the upper and lower fabric layers at a preset tension during weaving. Specifically, it is woven on a double-needle bed warp knitting machine, with the spacer fiber layer interwoven between the two fabric layers while maintaining a tension of 20cN. The other end of the spacer fiber layer is connected to the weft yarn of the upper fabric by the yarn guide on the upper needle bed, forming a three-dimensional structure. Throughout the weaving process, the machine speed is controlled at 15m / min to ensure uniform tension of the spacer fiber layer, ultimately forming a double-layer fabric structure with a 3mm gap height.

[0036] Both the warp and weft composite yarns adopt a four-layer covering structure, including a core layer, a first covering layer, a second covering layer, and an outer layer. The core layer is graphene-modified nylon yarn, the first covering layer is nano-silver Tencel fiber, the second covering layer is phase change microcapsule Tencel fiber, and the outer layer is antibacterial Tencel fiber. The graphene-modified nylon yarn in the core layer is 120D / 36FDTY yarn, the nano-silver Tencel fiber in the first covering layer is 32 count, the phase change microcapsule Tencel fiber in the second covering layer is 28 count, and the antibacterial Tencel fiber in the outer layer is 36 count.

[0037] The warp composite yarn uses a twisting method of first Z-twist and then S-twist, with the first Z-twist being 200 twists / meter and the second S-twist being 160 twists / meter; the weft composite yarn uses a twisting method of first S-twist and then Z-twist, with the first S-twist being 240 twists / meter and the second Z-twist being 180 twists / meter; the warp composite yarn specification is 110 / 3, and the weft composite yarn specification is 135 / 3.

[0038] The core layer has a graphene-modified nylon filament tension of 35 cN, the first coating layer has a coating angle of 35°, the second coating layer has a coating angle of 55°, and the outer layer has a coating angle of 75°.

[0039] The lower fabric is impregnated with a chitosan solution at a concentration of 1 g / L, at a temperature of 60°C, for 30 minutes.

[0040] Example 2: This example provides a skin-friendly fabric made of Tencel and nylon blend, including an upper fabric and a lower fabric. Both the upper and lower fabrics are blended fabrics of Tencel and graphene-modified nylon, with a weight ratio of 65:35 between Tencel and graphene-modified nylon. A spacer fiber layer is provided between the upper fabric and the lower fabric, and the two ends of the spacer fiber layer are woven and connected to the upper fabric and the lower fabric respectively. Blended fabrics are woven from warp composite yarns and weft composite yarns, with a weight ratio of 1:2.2 between the warp composite yarns and the weft composite yarns.

[0041] The spacer fiber layer is made of elastic polyurethane monofilament; the spacing height of the spacer fiber layer is 5 mm, and the distribution density is 30 fibers / cm. 2 The fibers are evenly distributed, and the connection between the interlayer fibers and the upper and lower fabrics is warp knitting. The spacer fiber layer is interwoven between the upper and lower fabrics with a preset tension during weaving.

[0042] Both the warp and weft composite yarns adopt a four-layer covering structure, including a core layer, a first covering layer, a second covering layer, and an outer layer. The core layer is graphene-modified nylon yarn, the first covering layer is nano-silver Tencel fiber, the second covering layer is phase change microcapsule Tencel fiber, and the outer layer is antibacterial Tencel fiber. The graphene-modified nylon yarn in the core layer is 120D / 36FDTY yarn, the nano-silver Tencel fiber in the first covering layer is 32 count, the phase change microcapsule Tencel fiber in the second covering layer is 28 count, and the antibacterial Tencel fiber in the outer layer is 36 count.

[0043] The warp composite yarn uses a twisting method of first Z-twist and then S-twist, with the first Z-twist being 200 twists / meter and the second S-twist being 160 twists / meter; the weft composite yarn uses a twisting method of first S-twist and then Z-twist, with the first S-twist being 240 twists / meter and the second Z-twist being 180 twists / meter; the warp composite yarn specification is 110 / 3, and the weft composite yarn specification is 135 / 3.

[0044] The core layer has a graphene-modified nylon filament tension of 38 cN, the first coating layer has a coating angle of 40°, the second coating layer has a coating angle of 60°, and the outer layer has a coating angle of 80°.

[0045] The lower fabric is impregnated with a chitosan solution at a concentration of 2 g / L, at a temperature of 50°C, for 45 minutes.

[0046] Example 3: This example provides a skin-friendly fabric made of Tencel and nylon blend, including an upper fabric and a lower fabric. Both the upper and lower fabrics are blended fabrics of Tencel and graphene-modified nylon, with a weight ratio of 70:30 between Tencel and graphene-modified nylon. A spacer fiber layer is provided between the upper fabric and the lower fabric, and the two ends of the spacer fiber layer are woven and connected to the upper fabric and the lower fabric respectively. Blended fabrics are woven from warp composite yarns and weft composite yarns, with a weight ratio of 1:2.5 between the warp composite yarns and the weft composite yarns.

[0047] The spacer fiber layer is made of elastic polyurethane monofilament; the spacing height of the spacer fiber layer is 8 mm, and the distribution density is 20 fibers / cm. 2 They are arranged in a regular array, and the connection between the interlayer fiber and the upper and lower fabrics is warp knitting. The spacer fiber layer is interwoven between the upper and lower fabrics with a preset tension during weaving.

[0048] Both the warp and weft composite yarns adopt a four-layer covering structure, including a core layer, a first covering layer, a second covering layer, and an outer layer. The core layer is graphene-modified nylon yarn, the first covering layer is nano-silver Tencel fiber, the second covering layer is phase change microcapsule Tencel fiber, and the outer layer is antibacterial Tencel fiber. The graphene-modified nylon yarn in the core layer is 120D / 36FDTY yarn, the nano-silver Tencel fiber in the first covering layer is 32 count, the phase change microcapsule Tencel fiber in the second covering layer is 28 count, and the antibacterial Tencel fiber in the outer layer is 36 count.

[0049] The warp composite yarn uses a twisting method of first Z-twist and then S-twist, with the first Z-twist being 200 twists / meter and the second S-twist being 160 twists / meter; the weft composite yarn uses a twisting method of first S-twist and then Z-twist, with the first S-twist being 240 twists / meter and the second Z-twist being 180 twists / meter; the warp composite yarn specification is 110 / 3, and the weft composite yarn specification is 135 / 3.

[0050] The core layer has a graphene-modified nylon filament tension of 40 cN, the first coating layer has a coating angle of 45°, the second coating layer has a coating angle of 65°, and the outer layer has a coating angle of 85°.

[0051] The lower fabric is impregnated with a chitosan solution at a concentration of 3 g / L, at a temperature of 40°C, for 60 minutes.

[0052] Comparative Example 1 describes a fabric lacking a spacer fiber layer structure, specifically a traditional Tencel and nylon blended fabric with a single-layer design. The fabric is a blend of Tencel and graphene-modified nylon, with a weight ratio of 65:35. The blended fabric is woven from warp and weft composite yarns, with a warp-to-weft composite yarn weight ratio of 1:2.2.

[0053] Both the warp and weft composite yarns employ a four-layer coating structure, comprising a core layer of graphene-modified nylon filament, a first coating layer of nano-silver Tencel fiber, a second coating layer of phase change microcapsule Tencel fiber, and an outer layer of antibacterial Tencel fiber. The specifications of each layer are the same as in Example 2. The twisting method, tension parameters, and coating angle are also consistent with Example 2. The fabric is also impregnated with a chitosan solution under the same conditions as in Example 2.

[0054] Comparative Example 2 employs a standard three-layer covering structure, specifically providing a simplified Tencel / nylon blended fabric, comprising an upper fabric and a lower fabric. Both the upper and lower fabrics are blends of Tencel and graphene-modified nylon, with a weight ratio of 65:35. A spacer fiber layer is provided between the upper and lower fabrics. This spacer fiber layer is composed of elastic polyurethane monofilaments with a spacing height of 5 mm and a distribution density of 30 fibers / cm². 2 The connection method is warp knitting.

[0055] The main difference from Example 2 is that the warp and weft composite yarns in Comparative Example 2 only employ a three-layer coating structure, including a core layer of graphene-modified nylon yarn, a coating layer of Tencel fiber, and an outer layer of antibacterial Tencel fiber. It lacks the nano-silver Tencel fiber layer and the phase change microcapsule Tencel fiber layer. The lower fabric is not treated with chitosan.

[0056] Comparative Example 3 presents a chitosan-free, double-layer structure, specifically an untreated Tencel and nylon blended fabric. The structural configuration is essentially the same as in Example 2, including a double-layer fabric structure, spacer fiber layers, and four layers of wrapped composite yarn. Both the upper and lower layers are Tencel and graphene-modified nylon blended fabrics, with a Tencel to graphene-modified nylon weight ratio of 65:35. The spacer fiber layer parameters, composite yarn structure, twisting method, and wrapping angle are consistent with Example 2.

[0057] The only difference from Example 2 is that the lower fabric of Comparative Example 3 is not impregnated with chitosan solution and is used directly in its original state.

[0058] Table 1: Comparison of performance test results between Example 2 and the comparative example

[0059] Example 2 exhibited the best performance in both warp and weft breaking elongation, reaching 15.2% and 42.3% respectively, primarily due to its unique four-layer coated composite yarn structure design. The graphene-modified nylon filament core layer provided an excellent elastic foundation; the two-dimensional sheet structure of graphene effectively dispersed stress during stretching, improving the yarn's tensile strength. The first coating layer, nano-silver Tencel fiber, not only possessed antibacterial properties, but its soft Tencel substrate also enhanced the yarn's flexibility and extensibility. The microcapsules in the second coating layer, phase change microcapsule Tencel fiber, acted as a buffer under stress, further improving elasticity. The outer antibacterial Tencel fiber served as a protective layer, ensuring the stability of the inner structure during deformation. In contrast, Comparative Example 2 only employed a three-layer coating structure, lacking the synergistic effect of the nano-silver layer and the phase change microcapsule layer, resulting in decreased elasticity.

[0060] The difference in compression resilience in the thickness direction was most pronounced, reaching 87.5% in Example 2, while Comparative Example 1, due to its traditional single-layer structure, could not perform this test at all. The fundamental reason for this difference lies in the application of spacer fiber layer technology. Elastic polyurethane monofilaments, acting as spacer fiber layers, are interwoven between the upper and lower fabric layers at a preset tension during weaving, forming a unique three-dimensional elastic support network. When the fabric is subjected to pressure in the thickness direction, the polyurethane monofilaments undergo elastic deformation, and their excellent elastic recovery characteristics allow the fabric to quickly return to its original thickness. Simultaneously, the warp-knitted connection between the spacer fiber layer and the upper and lower fabric layers ensures effective force transmission and dispersion, avoiding localized stress concentration. Although Comparative Example 3 also has a spacer structure, the lack of chitosan treatment results in a higher coefficient of friction between the fibers, affecting the overall elastic coordination.

[0061] Differences in thermal conductivity reflect the quality of a fabric's insulation performance. The three-dimensional spatial structure created by the spacer fiber layers forms numerous static air layers, whose low thermal conductivity effectively blocks heat transfer. The different thermal conductivity characteristics of the fibers in each layer of the four-layer coated composite yarn create a gradient thermal resistance effect, further reducing the overall thermal conductivity. Although graphene-modified nylon has some thermal conductivity, its thermal conductivity advantage is effectively controlled by being encased in other low-thermal-conductivity layers within the composite structure. Comparative Example 2, due to its simplified structure and lack of sufficient thermal resistance layers, exhibits the highest thermal conductivity.

[0062] Chitosan molecules contain numerous hydroxyl and amino groups, which can form hydrogen bonds with water molecules, enhancing the fiber's hydrophilicity and moisture absorption capacity. Simultaneously, chitosan treatment alters the fiber surface's microstructure, increasing surface roughness and specific surface area, providing more channels for moisture absorption and transport. The three-dimensional ventilation system formed by the spacer structure synergistically works with chitosan's hygroscopic properties to create an efficient moisture management mechanism. Comparative Example 3, lacking chitosan treatment, retains its original fiber surface with relatively poor hydrophilicity, resulting in a significant decrease in water absorption and moisture permeability.

[0063] The difference in pH value and skin irritation highlights the importance of fabric biocompatibility. Example 2, with a pH of 6.8, is close to the slightly acidic environment of human skin, achieving a skin irritation rating of 0 (no irritation), primarily due to the biological properties of chitosan. As a natural polysaccharide macromolecule, chitosan possesses excellent biocompatibility and bioactivity; its slightly acidic nature helps maintain the acid-base balance of the skin surface. Chitosan molecules also have natural antibacterial and anti-inflammatory properties, inhibiting the growth of harmful bacteria and reducing the risk of skin infections and allergic reactions. Furthermore, chitosan treatment forms a protective biofilm on the fiber surface, reducing direct friction between the fiber and skin and minimizing mechanical irritation. Comparative Example 3, without chitosan treatment, has a rough fiber surface and a slightly alkaline pH, easily causing irritation upon skin contact, achieving a skin irritation rating of 2.

[0064] Example 4, refer to Figures 1-3 This embodiment provides a phase change temperature regulating fiber layer. The upper fabric surface is provided with a phase change temperature regulating fiber layer, and the phase change temperature regulating fiber layer is implanted into the upper fabric surface in a waveform distribution manner. The phase change temperature regulating fiber layer has a wavelength of 15mm and an amplitude of 1mm. The phase change temperature regulating fiber layer is made of polyester fiber containing paraffin microcapsules, and the microcapsule diameter is 2μm.

[0065] like Figure 3 As shown, the phase change temperature regulating fiber layer has a spiral gradient waveform distribution with a spiral period of 15 mm, a gradient amplitude of 1 mm, and a spiral angle of 30°.

[0066] The distribution path of the phase change temperature-regulating fiber layer on the fabric surface exhibits both three-dimensional spiral and two-dimensional waveform characteristics. The spiral characteristic is manifested in the fiber bundle rotating and advancing around a virtual axis. The waveform characteristic is reflected in the fact that, during the spiral advance, the fiber bundle oscillates in a sinusoidal waveform in a plane perpendicular to the direction of advance.

[0067] The linear density of the phase change temperature-regulating fiber layer is 15 tex, and the microcapsule wall thickness of the paraffin microcapsules is 0.1 μm.

[0068] Example 5: This example provides a phase change temperature regulating fiber layer. The upper fabric surface is provided with a phase change temperature regulating fiber layer, and the phase change temperature regulating fiber layer is implanted into the upper fabric surface in a waveform distribution manner. The wavelength of the phase change temperature regulating fiber layer is 20 mm, the amplitude is 6 mm, and the phase change temperature regulating fiber layer is made of polyester fiber containing paraffin microcapsules with a microcapsule diameter of 5 μm.

[0069] The phase change temperature-regulating fiber layer is distributed in a spiral gradient waveform with a spiral period of 20 mm, a gradient amplitude of 6 mm, and a spiral angle of 45°.

[0070] The linear density of the phase change temperature-regulating fiber layer is 20 tex, and the microcapsule wall thickness of the paraffin microcapsules is 0.3 μm.

[0071] Example 6: This example provides a phase change temperature regulating fiber layer. The upper fabric surface is provided with a phase change temperature regulating fiber layer, and the phase change temperature regulating fiber layer is implanted into the upper fabric surface in a waveform distribution manner. The wavelength of the phase change temperature regulating fiber layer is 17 mm and the amplitude is 3 mm. The phase change temperature regulating fiber layer is made of polyester fiber containing paraffin microcapsules, and the microcapsule diameter is 3 μm.

[0072] The phase change temperature-regulating fiber layer is distributed in a spiral gradient waveform with a spiral period of 18 mm, a gradient amplitude of 4 mm, and a spiral angle of 40°.

[0073] The linear density of the phase change temperature-regulating fiber layer is 18 tex, and the microcapsule wall thickness of the paraffin microcapsules is 0.2 μm.

[0074] Comparative Example 4 is a phase change temperature-regulating fiber layer that exceeds the scope of the claims. Comparative Example 4 provides a phase change temperature-regulating fiber layer with parameters exceeding the scope of the claims of this invention. The phase change temperature-regulating fiber layer is disposed on the surface of an upper fabric layer, and the fiber layer is embedded in the upper fabric surface in a waveform distribution. The wavelength of the phase change temperature-regulating fiber layer is 25 mm, the amplitude is 8 mm, and the fiber layer is made of polyester fiber containing paraffin microcapsules with a microcapsule diameter of 7 μm. The phase change temperature-regulating fiber layer has a spiral gradient waveform distribution with a spiral period of 25 mm, a gradient amplitude of 8 mm, and a spiral angle of 60°. The linear density of the phase change temperature-regulating fiber layer is 25 tex, and the microcapsule wall thickness of the paraffin microcapsules is 0.5 μm.

[0075] Comparative Example 4 exhibits a wavelength of 25mm and an amplitude as high as 8mm. These excessively large geometric dimensions lead to multiple technical problems. First, the excessively long wavelength reduces the distribution density of phase change fiber bundles on the fabric surface, decreasing the number of thermoregulating active points per unit area and affecting the uniformity and response speed of temperature regulation. Second, the excessively high amplitude causes the fiber bundles to form noticeable protrusions on the fabric surface, affecting not only the fabric's smoothness and feel but also potentially causing discomfort during wear, especially when in contact with the skin, which may result in localized pressure.

[0076] Comparing Example 6, which uses a 40° helix angle, this angle maintains good structural stability while ensuring the flexibility of the fiber bundle. A moderate helix angle allows the phase change fiber bundles to deform in a coordinated manner during fabric deformation, avoiding fiber bundle breakage caused by stress concentration. The 60° helix angle in Comparative Example 4 is too large. While it provides greater flexibility, it sacrifices structural stability, making it prone to plastic deformation during repeated stretching and compression, affecting the durability of the temperature regulation function. Furthermore, an excessively large helix angle increases the actual length of the phase change fiber bundle, reducing the effective phase change material density per unit area.

[0077] The difference in linear density reflects the varying capacity of the phase change fiber bundles to carry phase change materials. Example 6 selected a linear density of 18 tex, ensuring sufficient phase change material carrying capacity while maintaining the softness and processability of the fiber bundles. This linear density matches well with the fiber characteristics of the fabric base and does not negatively impact the overall hand feel and drape of the fabric. Comparative Example 4, with its 25 tex linear density, is too high. While it can carry more phase change material, it makes the fiber bundles coarser and stiffer, affecting the fabric's softness and comfort, and also causing greater damage to the base fabric fibers during implantation.

[0078] Example 6 employs a wall thickness of 0.2 μm. This thickness effectively protects the internal paraffin phase change material, preventing leakage during processing and use, while ensuring efficient heat transfer during the phase change process. A wall thickness that is too thin is prone to breakage, while a wall thickness that is too thick hinders heat conduction. While the 0.5 μm wall thickness of Comparative Example 4 provides stronger protection, it impedes heat transfer, slows down the phase change response, and reduces temperature regulation efficiency. Furthermore, the thick-walled microcapsules exhibit smaller volume changes during the phase change process, resulting in a relatively limited temperature regulation effect.

[0079] Reference Figure 2 and Figure 3 As shown, Comparative Example 5 illustrates a common linear phase change temperature-regulating fiber layer in the prior art. This comparative example provides a conventional linearly distributed phase change temperature-regulating fiber layer. The phase change temperature-regulating fiber layer is disposed on the surface of the upper fabric layer, and the fiber layers are implanted into the surface of the upper fabric layer in a linear parallel distribution. The spacing between the phase change temperature-regulating fiber layers is 5 mm. The phase change temperature-regulating fiber layer is made of polyester fiber containing paraffin microcapsules, and the microcapsule diameter is 3 μm. The phase change temperature-regulating fiber layer is completely linearly distributed, without a wavy structure, has a linear density of 18 tex, and the microcapsule wall thickness of the paraffin microcapsules is 0.2 μm.

[0080] Traditional linear distribution is the most common form in existing technology, characterized by fiber bundles arranged in completely parallel straight lines. This distribution method has obvious technical defects: severe stress concentration, making the fabric prone to breakage when stretched; the temperature regulation zone is strip-shaped with uneven temperature distribution; lack of flexibility, affecting the fabric's hand feel and drape; and low degree of interweaving with the base fabric fibers, resulting in poor bonding strength.

[0081] Simple waveform distribution, as an improved version of traditional technology, is characterized by a regular sinusoidal distribution of fiber bundles, but it lacks helical and gradient features. Although this distribution has a certain degree of flexibility, there are still periodic stress concentration points; the temperature regulation effect is periodically distributed, and local temperature regulation blind spots may occur; it lacks a three-dimensional structure and cannot fully utilize the space in the fabric thickness direction.

[0082] Random distribution, as an experimental technique, is characterized by fiber bundles randomly distributed on the fabric surface. However, this method cannot precisely control the temperature regulation zone; the fiber bundles may exhibit overly concentrated or sparse areas; the manufacturing process is complex, with poor reproducibility; and quality control is difficult.

[0083] In contrast, the spiral gradient waveform distribution of this invention features a spiral structure that disperses tensile stress along three dimensions, avoiding stress concentration; the gradient characteristic enables a smooth temperature transition, eliminating temperature regulation blind spots; the composite structure of the waveform and the spiral provides optimal mechanical properties; and the parametric design facilitates precise control and mass production.

[0084] From the perspective of human comfort, the spatial resolution of human skin receptors is approximately 2-3 mm. The 15-20 mm spiral cycle in this invention ensures the uniformity of the temperature regulation effect within the skin's sensory range, avoiding temperature spots or streaks. From the perspective of material mechanics, the elastic modulus and elongation at break of polyester fibers determine the optimal stress-strain relationship within this cycle range, ensuring both structural stability and necessary flexibility. Considering heat conduction efficiency, this cycle range matches the heat diffusion length of human skin (approximately 10-15 mm), achieving optimal heat exchange.

[0085] When the spiral period exceeds 20mm, the spiral density decreases, resulting in fewer temperature-regulating active points per unit area and reducing the overall temperature regulation efficiency; the temperature regulation response time is prolonged, affecting dynamic temperature regulation performance; temperature regulation blind spots may appear in some parts of the fabric, causing uneven temperature distribution; the stress dispersion effect of the spiral structure is weakened, increasing the risk of fiber bundle breakage.

[0086] When the spiral period is less than 15mm, the spiral is too tight, which increases the manufacturing difficulty and cost and requires extremely high processing precision. Interference may occur between fiber bundles, affecting structural stability. Excessive fiber bundle density may affect the breathability and softness of the fabric. The manufacturing precision requirements are extremely high, making mass production difficult and economical.

[0087] From the perspective of fabric thickness limitations, conventional textile fabrics are 0.5-3mm thick. A 6mm amplitude is 2-12 times the fabric thickness, which can fully utilize three-dimensional space without excessively protruding from the fabric surface. From a comfort perspective, excessive amplitude will create noticeable bulges on the fabric surface, affecting wearing comfort, especially potentially causing a feeling of pressure when in direct contact with the skin. From the perspective of phase change efficiency, this amplitude range allows for sufficient heat exchange between the phase change material and the environment, ensuring both rapid temperature regulation response and avoiding excessive fluctuations.

[0088] When the amplitude reaches 7mm, the unevenness of the fabric surface exceeds the comfort threshold, affecting the wearing experience; the fiber bundles are easily damaged by external forces, reducing the service life; deformation is easily caused during the manufacturing process, affecting the stability of product quality; and wrinkles are easily generated when combined with the base fabric, affecting the appearance and performance of the fabric.

[0089] Example 7: This example provides a method for preparing a skin-friendly fabric, which adopts a segmented shaping process, specifically including: the first segment temperature is 175℃, and the heat preservation time is 2 minutes; the second segment temperature is 150℃, and the processing time is 4 minutes; the third segment temperature is 125℃, and the processing time is 10 minutes; the fourth segment temperature is 105℃, and the cooling time is 6 minutes.

[0090] The segmented setting process uses gradient cooling to maintain the fabric's three-dimensional structure and functional characteristics to the greatest extent. The high-temperature section fixes the fiber shape, the medium-temperature section stabilizes the spacing structure, and the low-temperature section relieves internal stress, ensuring the fabric's dimensional stability while maintaining good elasticity and hand feel.

[0091] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the present invention.

Claims

1. A skin-friendly fabric blended with Tencel and nylon, characterized in that: Including the upper and lower layers of fabric; A spacer fiber layer is provided between the upper fabric and the lower fabric, and the two ends of the spacer fiber layer are woven and connected to the upper fabric and the lower fabric respectively. The blended fabric is woven from warp composite yarn and weft composite yarn, and the weight ratio of the warp composite yarn to the weft composite yarn is 1:2~2.

5. The upper fabric surface is provided with a phase change temperature regulating fiber layer, and the phase change temperature regulating fiber layer is implanted into the upper fabric surface in a waveform distribution manner. The phase change temperature-regulating fiber layer has a wavelength of 15~20mm and an amplitude of 1~6mm. The phase change temperature-regulating fiber layer is made of polyester fiber containing paraffin microcapsules with a diameter of 2~5μm.

2. The skin-friendly fabric blended with Tencel and nylon as described in claim 1, characterized in that: The spacer fiber layer is an elastic polyurethane monofilament; The spacing height of the spacer fiber layer is 3~8mm, and the distribution density is 20~40 fibers / cm. 2 The fibers are evenly distributed or regularly arrayed, and the connection between the spacer fiber layer and the upper and lower fabrics is either warp-knitted or weft-knitted. The spacer fiber layer is interwoven between the upper and lower fabrics with a preset tension during weaving; Both the upper and lower fabrics are blended fabrics of Tencel and graphene-modified nylon, with a weight ratio of 60-70:30-40 between Tencel and graphene-modified nylon.

3. The skin-friendly fabric blended with Tencel and nylon as described in claim 2, characterized in that: Both the warp composite yarn and the weft composite yarn adopt a four-layer covering structure, including a core layer, a first covering layer, a second covering layer, and an outer layer; The core layer is graphene-modified nylon fiber, the first coating layer is nano-silver Tencel fiber, the second coating layer is phase change microcapsule Tencel fiber, and the outer layer is antibacterial Tencel fiber. The graphene-modified nylon filament of the core layer is 120D / 36F DTY filament, the nano-silver Tencel fiber of the first coating layer is 32 count, the phase change microcapsule Tencel fiber of the second coating layer is 28 count, and the antibacterial Tencel fiber of the outer layer is 36 count.

4. The skin-friendly fabric blended with Tencel and nylon as described in claim 3, characterized in that: The warp composite yarn adopts a twisting method of first Z twist and then S twist, with the first Z twist being 200 twists / meter and the second S twist being 160 twists / meter; The weft composite yarn adopts a twisting method of first S twist and then Z twist, with the first S twist being 240 twists / meter and the second Z twist being 180 twists / meter; The warp composite yarn has a specification of 110 / 3, and the weft composite yarn has a specification of 135 / 3.

5. The skin-friendly fabric made of Tencel and nylon blend as described in claim 1 or 4, characterized in that: The phase change temperature-regulating fiber layer is distributed in a spiral gradient waveform with a spiral period of 15~20mm, a gradient amplitude of 1~6mm, and a spiral angle of 30~45°.

6. The skin-friendly fabric blended with Tencel and nylon as described in claim 5, characterized in that: The linear density of the phase change temperature-regulating fiber layer is 15~20 tex, and the microcapsule wall thickness of the paraffin microcapsules is 0.1~0.3 μm.

7. The skin-friendly fabric blended with Tencel and nylon as described in claim 6, characterized in that: The graphene-modified nylon filament of the core layer has a tension of 35~40cN, the first coating layer has a coating angle of 35~45°, the second coating layer has a coating angle of 55~65°, and the outer layer has a coating angle of 75~85°.

8. The skin-friendly fabric blended with Tencel and nylon as described in claim 7, characterized in that: The lower fabric is impregnated with a chitosan solution at a concentration of 1-3 g / L, at a temperature of 40-60°C, and for 30-60 minutes.

9. A method for preparing a skin-friendly fabric as described in any one of claims 1-8, characterized in that: The skin-friendly fabric is manufactured using a segmented shaping process, specifically including: The first temperature is 175℃, and the heat preservation time is 2 minutes. The second stage temperature is 150℃, and the processing time is 4 minutes. The third stage temperature is 125℃, and the processing time is 10 minutes. The fourth temperature is 105℃, and the cooling time is 6 minutes.

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