Bio-based composite fiber skin-friendly fashionable knitted fabric and weaving method thereof

Abstract

The invention discloses a bio-based composite fiber skin-friendly fashionable knitted fabric and a weaving method thereof. The fabric is a double-faced fabric with different structures of a surface layer and an inner layer and is formed by weaving biomass collagen composite fiber / modal blended yarn, modal / cotton blended yarn and low-temperature spandex, the structure of the fabric is that variable plain weave and variable twill weave are longitudinally and alternately circulated, the surface layer is in interval continuous twill weave, and the inner layer is in uniform concave point plain weave. A specific stitch length double-sided machine is adopted for weaving, different yarns are threaded according to odd and even paths, and the yarn inlet length and tension of each path are controlled. Through cooperation of functional fibers and a special structure, the fabric has excellent skin-friendly moisture retention, broad-spectrum antibacterial activity (the antibacterial rate is larger than 98%), high air permeability (the air permeability is 820 mm / s) and rich amino acid content (the total content of 16 amino acids accounts for 2.32%), is fashionable and attractive in appearance and is suitable for high-end underwear.

Description

Technical Field

[0001] This invention belongs to the field of textile product technology, specifically relating to the improvement of knitted products and their production processes, and more specifically to a method for weaving a bio-based composite fiber skin-friendly fashion knitted fabric. Background Technology

[0002] In recent years, underwear and briefs made from synthetic protein fibers produced from various natural proteins have become popular in Europe, America, and Japan. These protein fibers include, as mentioned above, corn protein fiber, peanut protein fiber, soybean protein fiber, and collagen fiber. Among them, collagen fiber is attracting increasing attention due to its unique advantages. Collagen fiber is almost identical to human skin tissue, possessing excellent affinity and wearing comfort. Its dry and wet strength exceed that of wool, and its elasticity far surpasses wool. Collagen fiber also has antibacterial properties, making it particularly suitable for making underwear and briefs worn close to the skin. Collagen fiber can also be used to make surgical sutures; when wounds heal, the sutures do not need to be removed and can be absorbed by the body. Based on collagen, Shudi fiber can give fabrics excellent moisturizing and skin-friendly properties.

[0003] In modern society, the demand for high-quality clothing is growing. It is of great significance to develop a knitted fabric that can fully exert its softness, moisturizing, skin-friendly and antibacterial properties on the side in contact with the skin, and achieve the effects of beauty, moisture absorption and breathability, and delicate softness through jacquard weave, to make it suitable for high-end fashion underwear. Summary of the Invention

[0004] Based on the above background, this invention provides a bio-based composite fiber skin-friendly fashion knitted fabric and its weaving method. It uses Shudi fiber as the basic component, preferably combined with modal, cotton, and other components in an interweaving pattern. Through practical research and analysis, the optimal weaving structure is selected, and the surface exhibits a spaced, continuous, and varied twill pattern. This fully utilizes the multiple functions of Shudi fiber and other multi-component fibers, particularly its softness, moisturizing, skin-friendly, antibacterial, and breathable properties. Furthermore, it has a unique, delicate, and soft appearance, meeting people's growing pursuit of aesthetics and multifunctionality.

[0005] The present invention adopts the following technical solution:

[0006] A bio-based composite fiber skin-friendly fashion knitted fabric, wherein the knitted fabric is a double-sided fabric with different outer and inner layer structures, which is knitted by two different blended yarns and low-temperature spandex through a double-sided machine, and the knitting structure is formed by alternating plain weave and alternating twill weave in the longitudinal direction.

[0007] The surface layer has a pattern of alternating, continuous diagonal stripes, while the inner layer has a pattern of alternating flat stripes with uniformly spaced indentations.

[0008] The two blended yarns are a biomass collagen composite fiber / modal fiber blended yarn and a modal fiber / cotton fiber blended yarn, respectively.

[0009] The fabric density of the knitted fabric is: 80-90 rows / 25.4 mm in the warp and 55-65 rows / 25.4 mm in the weft.

[0010] Furthermore, preferably, the fabric density of the knitted fabric is: 85 rows / 25.4 mm in the warp and 60 rows / 25.4 mm in the weft.

[0011] Furthermore, in the aforementioned knitted fabric, the biomass collagen composite fiber / modal fiber blended yarn has a weight ratio of biomass collagen composite fiber to modal fiber of 20~80:80~20 and a linear density of 4.9~29.5tex.

[0012] Furthermore, in the aforementioned knitted fabric, the modal fiber / cotton fiber blended yarn has a weight ratio of modal fiber to cotton fiber of 10~90:90~10 and a linear density of 7.3~29.5 tex.

[0013] Furthermore, in the aforementioned knitted fabric, the low-temperature spandex has a specification of 10~30 D.

[0014] Furthermore, the aforementioned knitted fabric has a dry weight of 165~175 g / m². 2 .

[0015] Furthermore, the width of the aforementioned knitted fabric is 67-77 cm.

[0016] Furthermore, in the aforementioned knitted fabric, the biomass collagen composite fiber is Shudi fiber.

[0017] This invention also discloses a weaving method for the above-mentioned bio-based composite fiber skin-friendly fashion knitted fabric, which is woven using a double-sided knitting machine with a needle pitch of 32G, and includes the following steps:

[0018] S1: Yarn configuration and threading: The biomass collagen composite fiber / modal fiber blended yarn is threaded into the odd-numbered thread of the double-face machine; the modal fiber / cotton fiber blended yarn and the low-temperature spandex are simultaneously threaded into the even-numbered thread.

[0019] S2: Knitting control: Control the yarn feed length of the odd-numbered paths to 238~242 mm / 100 needles; control the yarn feed length of the modal / cotton blended yarn in the even-numbered paths to 258~262 mm / 100 needles, and the yarn feed length of the low-temperature spandex to 98~102 mm / 100 needles; and control the total yarn feed tension during the knitting process to 3.8~4.5 N.

[0020] Furthermore, in the above weaving method, in step S2, the low-temperature spandex is fed into the weaving process in a padding manner.

[0021] Furthermore, the above-mentioned weaving method further includes a post-processing step of low-temperature setting of the woven fabric.

[0022] The beneficial effects of this invention are:

[0023] (1) Using Shudi fiber as the basic component, it is blended with Modal to form yarn. The advantages of each component complement each other, making it more comfortable and soft to wear next to the skin. It also adds antibacterial function, which can effectively inhibit the bacteria that grow in the wearing environment. With the addition of cotton fiber and low-temperature spandex, the fabric is more sun-resistant and less prone to deformation while ensuring the fabric's feel and moisture absorption performance.

[0024] (2) Specific weaving structure is selected, and the side in contact with the skin can fully exert the functions of softness, moisturizing, skin-friendly and antibacterial. By changing the twill weave, it can achieve the effects of beauty, moisture absorption and breathability, and delicate softness, so as to make high-end fashion underwear and meet people's growing demand for high-quality clothing.

[0025] (3) By utilizing the organic arrangement of yarn, triangles, and knitting needles, as well as the adjustment of loop density, thread length and tension, the bottleneck problems such as weak strength and easy to break holes in the production process are overcome, forming a perfect weaving process, making the fabric unique in style, soft in luster, beautiful in appearance, soft and comfortable to the skin, and fully embodying the functions of skin-friendly comfort, moisture absorption and breathability, elasticity and shape retention, antibacterial and support functions, suitable for close-fitting wear. Attached Figure Description

[0026] Figure 1 Design image of the front (surface) of a bio-based composite fiber skin-friendly fashion knitted fabric;

[0027] Figure 2 Design illustration of the reverse side (skin-contact side) of a bio-based composite fiber skin-friendly fashion knitted fabric;

[0028] Figure 3 A schematic diagram of the needle arrangement for the weaving process;

[0029] Figure 4 A schematic diagram of the triangular arrangement of the weaving process on the loom;

[0030] Figure 5 A schematic diagram of the weaving process on the loom. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The biomass collagen composite fiber used in this invention, commercially known as Shudi fiber (also called peptide fiber), is purchased from Sichuan Tianshu Biotechnology Co., Ltd. It is a polyvinyl alcohol collagen composite fiber. Its preparation method can also be found in Example 2 of the publicly disclosed invention CN118441373A, "A Bio-based Protein Composite Fiber and its Preparation Method." In this invention, any biomass collagen composite fiber possessing similar composition and functional characteristics as described above is applicable.

[0032] Example 1:

[0033] Combination Figure 1 , Figure 2 This bio-based composite fiber skin-friendly and fashionable knitted fabric is made from a blend of biomass collagen composite fiber (trade name: Shudi fiber) / modal fiber yarn and a blend of modal fiber / cotton fiber yarn. The weave structure alternates between varied plain weave and varied twill weave. The varied plain weave uses Shudi fiber / modal fiber blended yarn, while the varied twill weave uses modal fiber / cotton fiber blended yarn and low-temperature spandex. The weight ratio of Shudi fiber to modal fiber in the blended yarn is 40:60, with a linear density of 7.3 tex; the weight ratio of modal fiber to cotton fiber in the blended yarn is 60:40, with a linear density of 9.8 tex; the low-temperature spandex specification is 20D.

[0034] Dry weight of knitted fabric: 170g / ㎡; Fabric density: 85 warp rows / 25.4mm, 60 weft rows / 25.4mm.

[0035] This bio-based composite fiber skin-friendly fashion knitted fabric features a cyclical structure that creates a spaced, continuous, varying twill weave on the surface and a dotted, varying plain weave on the inner side. Through yarn selection and the choice of knitting needles and gussets, the superior properties of various fibers are fully utilized, achieving multiple benefits such as skin-friendliness, moisturizing, breathability, and antibacterial properties. It is a knitted fabric that combines aesthetics and functionality, suitable for making various types of knitted underwear products.

[0036] The weaving method for bio-based composite fiber skin-friendly fashion knitted fabric is as follows:

[0037] The knitted fabric is woven using a 32G high-gauge double-sided knitting machine;

[0038] The odd-numbered threads (1, 3, 5, 7, ...) of the knitted fabric are threaded with 7.3tex Suddi / Modal 40 / 60 blended yarn;

[0039] The even-numbered threads (2, 4, 6, 8, ...) are threaded with 9.8tex modal / cotton fiber 60 / 40 blended yarn and 20D low-temperature spandex;

[0040] The thread feed length for knitted fabrics is:

[0041] The feed length of odd-numbered paths (1, 3, 5, 7, ...) is (240±2) mm / 100 pins;

[0042] The feed length of the even-numbered threads (2, 4, 6, 8, ...) is (260±2) mm / 100 needles, and the low-temperature spandex yarn is (100±2) mm / 100 needles.

[0043] The yarn tension for this weaving method is 4N. Insufficient tension will cause unstable equipment operation and may result in horizontal lines; excessive tension may cause yarn breakage and holes.

[0044] The knitting process used in this invention is as follows:

[0045] (a) Equipment parameters:

[0046] Model: High Needle Length Duplexer V-8ER22

[0047] Size: 32 pins / 2.54cm

[0048] Tube diameter: 34 inches

[0049] Count of stitches: 3408

[0050] Route number: 60

[0051] (II) On-machine process:

[0052] 1. For example Figure 3 As shown, the knitting arrangement is as follows: the upper needle plate has 12 rows of needles with alternating high and low heels; the lower needle cylinder has 12, 3, and 4 rows of needles with alternating high and low heels.

[0053] 2. For example Figure 4 The diagram shown is a triangular arrangement.

[0054] 3. For example Figure 5 The knitting diagram shown clearly illustrates the loop formation and padding relationship of different yarns on the high and low heel needles in the odd and even-numbered rows, specifically presenting the formation process of the varied plain weave and varied twill weave structures.

[0055] 4. Method of threading the yarn:

[0056] The odd-numbered threads (1, 3, 5, 7, ...) are threaded with 7.3tex Suddy / Modal 40 / 60 blended yarn;

[0057] The even-numbered threads (2, 4, 6, 8, ...) are threaded with 9.8tex modal / cotton 60 / 40 blended yarn and 20D low-temperature spandex, with the 20D low-temperature spandex fed in as a single-sided lining.

[0058] 5. Technical parameters:

[0059] (1) Incoming line length:

[0060] The feed length of odd-numbered paths (1, 3, 5, 7, ...) is (240±2) mm / 100 pins;

[0061] The feed length of the even-numbered threads (2, 4, 6, 8, ...) is (260±2) mm / 100 needles, and the low-temperature spandex yarn is (100±2) mm / 100 needles.

[0062] (2) Fabric density: 85 rows / 25.4mm in the warp and 60 rows / 25.4mm in the weft.

[0063] (3) Dry weight of knitted fabric: 170g / ㎡.

[0064] (4) Width of the machine: 72cm.

[0065] (III) Precautions for the weaving method of the present invention:

[0066] (1) Control the yarn tension between 3.8 and 4.5 N to avoid horizontal bars; control the draft ratio of low-temperature spandex yarn between 2.8 and 3.0 to prevent spandex yarn from breaking and to fully ensure the elasticity of low-temperature spandex yarn.

[0067] (2) Adjust the tension of each jacquard pattern and adjust the weaving according to the gear to prevent the fabric from tearing.

[0068] (iv) Main style and characteristics of the product:

[0069] This style of underwear is a long-sleeved or short-sleeved knitted underwear with a camisole function. The focus is on the design and sewing of a comfortable and functional fashionable knitted underwear.

[0070] (1) Luster: The fabric of this fashionable underwear is dyed with environmentally friendly dyes, using natural color and light colors such as light pink, apricot, light khaki, and light gray. The luster is soft and the visual effect is gentle and elegant. Combined with the spaced and continuous twill pattern on the surface of the fabric, the finished garment has a more fashionable effect.

[0071] Feel: The inner layer of this underwear is made of 7.3tex 40 Shudi fiber / 60M, which has a delicate, smooth and skin-friendly feel; the outer layer is made of 9.8tex 60M / 40C+20D low-temperature spandex, which has suitable elasticity without being tight, feels comfortable, and has excellent shape retention.

[0072] (2) Function and style:

[0073] This fashionable knitted underwear features a blend of modal and suede fibers in its inner layer. Suede fibers contain collagen, similar to human skin tissue, which helps retain moisture and maintain skin elasticity, giving suede fibers excellent biocompatibility. Modal fibers are soft and smooth, with a feel close to silk, and offer excellent moisture absorption and breathability.

[0074] The surface layer uses a modal and cotton blend yarn, which adds cotton fibers while ensuring the feel and moisture absorption of modal, making the fabric more sun-resistant and less prone to deformation.

[0075] Low-temperature spandex exhibits outstanding chemical resistance and color stability, performing exceptionally well under low-temperature setting conditions. Its setting effect and durability are significantly superior to ordinary spandex, resulting in less fabric curling and thus enhancing the structural stability and appearance consistency of the fabric.

[0076] The heat resistance of bio-based collagen composite fibers is generally low. Adding low-temperature spandex allows the fabric to be treated at lower temperatures, resulting in less fiber shrinkage, minimal change in strength, and less impact on whiteness, thus preserving the skin-friendly comfort of the bio-based collagen fibers to the greatest extent. Simultaneously, low-temperature treatment reduces damage to modal fibers, retaining their soft and smooth feel. The combination of these two factors further minimizes the adverse effects of temperature on fabric performance.

[0077] The addition of the above-mentioned yarns gives the underwear made from this fabric multiple functions, including skin-friendly comfort, moisture absorption and breathability, elasticity and shape retention, antibacterial support, and more.

[0078] Example 2:

[0079] Combination Figure 1 , Figure 2This bio-based composite fiber skin-friendly and fashionable knitted fabric is made from a blend of biomass collagen composite fiber (trade name: Shudi fiber) / modal fiber yarn and a blend of modal fiber / cotton fiber yarn. The weave structure alternates between varied plain weave and varied twill weave. The varied plain weave uses Shudi fiber / modal fiber blended yarn, while the varied twill weave uses modal fiber / cotton fiber blended yarn and low-temperature spandex. The weight ratio of Shudi fiber to modal fiber in the blended yarn is 30:70, with a linear density of 9.8 tex; the weight ratio of modal fiber to cotton fiber in the blended yarn is 50:50, with a linear density of 10.7 tex; the low-temperature spandex specification is 20D.

[0080] Dry weight of knitted fabric: 170g / ㎡; Fabric density: 85 warp rows / 25.4mm, 60 weft rows / 25.4mm.

[0081] This bio-based composite fiber skin-friendly fashion knitted fabric features a cyclical structure that creates a spaced, continuous, varying twill weave on the surface and a dotted, varying plain weave on the inner side. Through yarn selection and the choice of knitting needles and gussets, the superior properties of various fibers are fully utilized, achieving multiple benefits such as skin-friendliness, moisturizing, breathability, and antibacterial properties. It is a knitted fabric that combines aesthetics and functionality, suitable for making various types of knitted underwear products.

[0082] The weaving method for bio-based composite fiber skin-friendly fashion knitted fabric is as follows:

[0083] The knitted fabric is woven using a 32G high-gauge double-sided knitting machine;

[0084] The odd-numbered threads (1, 3, 5, 7, ...) of the knitted fabric are threaded with 9.8 tex Suddy / Modal 30 / 70 blended yarn;

[0085] The even-numbered threads (2, 4, 6, 8, ...) are threaded with 10.7tex modal / cotton 50 / 50 blended yarn and 20D low-temperature spandex.

[0086] The thread feed length for knitted fabrics is:

[0087] The feed length of odd-numbered paths (1, 3, 5, 7, ...) is (240±2) mm / 100 pins;

[0088] The feed length of the even-numbered threads (2, 4, 6, 8, ...) is (260±2) mm / 100 needles, and the low-temperature spandex yarn is (100±2) mm / 100 needles.

[0089] The yarn tension for this weaving method is 4N. Insufficient tension will cause unstable equipment operation and may result in horizontal lines; excessive tension may cause yarn breakage and holes.

[0090] Example 3:

[0091] Combination Figure 1 , Figure 2 This bio-based composite fiber skin-friendly and fashionable knitted fabric is made from a blend of biomass collagen composite fiber (trade name: Shudi fiber) / modal fiber yarn and a blend of modal fiber / cotton fiber yarn. The weave structure alternates between varied plain weave and varied twill weave. The varied plain weave uses Shudi fiber / modal fiber blended yarn, while the varied twill weave uses modal fiber / cotton fiber blended yarn and low-temperature spandex. The weight ratio of Shudi fiber to modal fiber in the blended yarn is 20:80, with a linear density of 9.8 tex; the weight ratio of modal fiber to cotton fiber in the blended yarn is 50:50, with a linear density of 10.7 tex; the low-temperature spandex specification is 20D.

[0092] Dry weight of knitted fabric: 170g / ㎡; Fabric density: 85 warp rows / 25.4mm, 60 weft rows / 25.4mm.

[0093] This bio-based composite fiber skin-friendly fashion knitted fabric features a cyclical structure that creates a spaced, continuous, varying twill weave on the surface and a dotted, varying plain weave on the inner side. Through yarn selection and the choice of knitting needles and gussets, the superior properties of various fibers are fully utilized, achieving multiple benefits such as skin-friendliness, moisturizing, breathability, and antibacterial properties. It is a knitted fabric that combines aesthetics and functionality, suitable for making various types of knitted underwear products.

[0094] The weaving method for bio-based composite fiber skin-friendly fashion knitted fabric is as follows:

[0095] The knitted fabric is woven using a 32G high-gauge double-sided knitting machine;

[0096] The odd-numbered threads (1, 3, 5, 7, ...) of the knitted fabric are threaded with 9.8 tex Suddy / Modal 20 / 80 blended yarn;

[0097] The even-numbered threads (2, 4, 6, 8, ...) are threaded with 10.7tex modal / cotton 50 / 50 blended yarn and 20D low-temperature spandex.

[0098] The thread feed length for knitted fabrics is:

[0099] The feed length of odd-numbered paths (1, 3, 5, 7, ...) is (240±2) mm / 100 pins;

[0100] The feed length of the even-numbered threads (2, 4, 6, 8, ...) is (260±2) mm / 100 needles, and the low-temperature spandex yarn is (100±2) mm / 100 needles.

[0101] The yarn tension for this weaving method is 4N. Insufficient tension will cause unstable equipment operation and may result in horizontal lines; excessive tension may cause yarn breakage and holes.

[0102] In the above three embodiments, in Embodiment 1, the biomass collagen composite fiber (trade name: Shudi fiber) accounts for 15.57% of the weight of the knitted fabric, the modal fiber accounts for 57.07% of the weight, the cotton fiber accounts for 22.48% of the weight, and the low-temperature spandex accounts for 4.88% of the weight.

[0103] In Example 2, the weight percentage of Shudi fiber in the knitted fabric was 13.18%, the weight percentage of Modal fiber was 56.72%, the weight percentage of cotton fiber was 25.97%, and the weight percentage of low-temperature spandex was 4.13%.

[0104] In Example 3, the weight percentage of Shudi fiber in the knitted fabric was 8.79%, the weight percentage of Modal fiber was 66.31%, the weight percentage of cotton fiber was 20.77%, and the weight percentage of low-temperature spandex was 4.13%.

[0105] Test example:

[0106] To verify the overall performance of the fabric of the present invention, the fabric obtained in Example 1 was used as the sample of the present invention, and the following comparative tests were conducted:

[0107] Comparative Example 1: Using only modal / cotton (60 / 40, 9.8 tex) blended yarn and 20D low-temperature spandex, the surface layer variation twill weave of the present invention was imitated on the same 32G double-sided machine (i.e., without the inner layer variation plain weave weave composed of sudi / modal blended yarn).

[0108] Comparative Example 2: The same yarn as in Example 1 (i.e., 7.3tex Suddy fiber / modal 40 / 60 blended yarn, 9.8tex modal / cotton 60 / 40 blended yarn and 20D low-temperature spandex) was used, but the yarn was woven on a 32G double-sided knitting machine using a common double-sided plain weave structure.

[0109] The following tests were performed on the fabrics of the present invention sample, Comparative Example 1, and Comparative Example 2:

[0110] 1. Breathability test:

[0111] According to relevant standards, the fabric air permeability was tested using a fabric air permeability meter, and the results are shown in Table 1:

[0112] Table 1: Air permeability test

[0113] sample Air permeability (mm / s) This invention (Example 1) 820 Comparative Example 1 650 Comparative Example 2 205

[0114] The above results show that the specific alternating structure of "surface layer changing twill + inner layer changing plain weave" of the present invention greatly improves the breathability compared with ordinary plain weave (Comparative Example 2); even compared with the structure that also has a twill appearance but no Shudi fiber inner layer (Comparative Example 1), the breathability is still significantly superior, which is attributed to the more permeable fabric space formed by the synergistic effect of multi-component yarns and special structure.

[0115] 2. Antibacterial performance test:

[0116] The tests were conducted according to standard FZ / T 73023 "Antibacterial Knitted Fabrics", and the results are shown in Table 2:

[0117] Testing items Technical Requirements Results of the present invention (Example 1) Comparative Example 1 Results Comparative Example 2 Results Staphylococcus aureus inhibition rate (%) ≥80 >99 No antibacterial properties >99 Candida albicans inhibition rate (%) ≥60 99 No antibacterial properties 99 Escherichia coli inhibition rate (%) ≥70 98 No antibacterial properties 98

[0118] The above tests demonstrate that the antibacterial function mainly originates from biomass collagen composite fibers (Shudi fibers). Comparative Example 1, lacking this fiber, exhibits no antibacterial properties; both the present invention and Comparative Example 2, containing Shudi fibers, demonstrate excellent broad-spectrum antibacterial effects, maintaining an antibacterial rate of over 98% after 50 washes, meeting the AAA standard.

[0119] 3. Amino acid content (skin-friendly material basis) test:

[0120] Following the method in GB / T 5009.124-2016, the fabric of Example 1 of this invention was tested after 30 washes, and the total content of 16 amino acids was found to be 2.32 g / 100g. Based on the fabric composition, collagen fiber accounted for 18.7% of the total fabric weight, and the high collagen content has a good skin-friendly effect.

[0121] No significant amino acids were detected in Comparative Examples 1 and 2. This quantitatively confirms that the fabric of the present invention, due to the presence of collagen-modified fibers, can continuously provide skin-friendly and moisturizing amino acid components to the skin-contact surface. The results are shown in Table 3.

[0122] Table 3: Amino Acid Content (Skin-Friendly Substances) Test:

[0123] Serial Number Testing items Test results (g / 100g) 1 Aspartic acid 0.20 2 threonine 0.089 3 Serine 0.099 4 glutamic acid 0.54 5 proline 0.25 6 glycine 0.056 7 alanine 0.092 8 Valine 0.16 9 Methionine 0.0097 10 Isoleucine 0.12 11 Leucine 0.26 12 Tyrosine 0.064 13 Phenylalanine 0.15 14 Lysine 0.098 15 Histidine 0.061 16 Arginine 0.068

[0124] 4. Subjective tactile evaluation:

[0125] Twenty evaluators conducted a blind tactile evaluation of the inner layer (skin-contact side) of three fabrics. The results showed that the fabric of this invention achieved a positive feedback rate (the proportion rated "excellent") of over 90% in all three indicators: "softness," "smoothness," and "warmth," significantly higher than Comparative Example 1 and Comparative Example 2 (positive feedback rates of approximately 60-75%). Evaluators generally agreed that the inner layer (variant plain weave) of the fabric of this invention had an exceptionally delicate and skin-friendly feel.

[0126] Conclusion: The above comparative tests fully demonstrate that the present invention, by using specific biomass collagen composite fibers (Shudi fibers) as functional components and designing a composite structure with alternating "surface layer changing twill weave / inner layer changing plain weave," does not simply superimpose existing raw materials or structures, but rather produces a synergistic effect. Specifically, it not only inherits the inherent antibacterial and skin-friendly moisturizing functions of collagen fibers, but also, through a unique double-sided structural design, achieves superior breathability and a better subjective sense of comfort, thus realizing a unified multi-functional approach of softness, moisturizing, skin-friendliness, antibacterial properties, and moisture absorption and breathability.

[0127] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A bio-based composite fiber skin-friendly fashion knitted fabric, characterized in that, The knitted fabric is a double-sided fabric with different outer and inner layer structures. It is made of two different blended yarns and low-temperature spandex by a double-sided machine, and the knitting structure is formed by alternating plain weave and alternating twill weave in the longitudinal direction. The surface layer has a pattern of alternating, continuous diagonal stripes, while the inner layer has a pattern of alternating flat stripes with uniformly spaced indentations. The two blended yarns are a biomass collagen composite fiber / modal fiber blended yarn and a modal fiber / cotton fiber blended yarn, respectively. The fabric density of the knitted fabric is: 80-90 rows / 25.4 mm in the warp and 55-65 rows / 25.4 mm in the weft.

2. The bio-based composite fiber skin-friendly fashion knitted fabric according to claim 1, characterized in that, In the biomass collagen composite fiber / modal fiber blended yarn, the weight ratio of biomass collagen composite fiber to modal fiber is 20~80:80~20, and the linear density is 4.9~29.5 tex.

3. The bio-based composite fiber skin-friendly fashion knitted fabric according to claim 1, characterized in that, In the modal / cotton blended yarn, the weight ratio of modal fiber to cotton fiber is 10~90:90~10, and the linear density is 7.3~29.5 tex.

4. The bio-based composite fiber skin-friendly fashion knitted fabric according to claim 1, characterized in that, The specifications of the low-temperature spandex are 10~30 D.

5. The bio-based composite fiber skin-friendly fashion knitted fabric according to claim 1, characterized in that, The dry weight of the knitted fabric is 165~175 g / m². 2 .

6. The bio-based composite fiber skin-friendly fashion knitted fabric according to claim 1, characterized in that, The width of the knitted fabric is 67-77 cm.

7. The bio-based composite fiber skin-friendly fashion knitted fabric according to claim 1, characterized in that, The biomass collagen composite fiber is Shudi fiber.

8. The method for weaving the bio-based composite fiber skin-friendly fashion knitted fabric as described in any one of claims 1-7, characterized in that, The knitting process, using a double-sided knitting machine with a stitch gauge of 32G, includes the following steps: S1: Yarn configuration and threading: The biomass collagen composite fiber / modal fiber blended yarn is threaded into the odd-numbered thread of the double-face machine; the modal fiber / cotton fiber blended yarn and the low-temperature spandex are simultaneously threaded into the even-numbered thread. S2: Knitting control: Control the yarn feed length of the odd-numbered paths to 238~242 mm / 100 needles; control the yarn feed length of the modal / cotton blended yarn in the even-numbered paths to 258~262 mm / 100 needles, and the yarn feed length of the low-temperature spandex to 98~102 mm / 100 needles; and control the total yarn feed tension during the knitting process to 3.8~4.5 N.

9. The weaving method according to claim 8, characterized in that, In step S2, the low-temperature spandex is fed into the weaving in a padding manner.

10. The weaving method according to claim 8, characterized in that, The weaving method also includes a post-treatment step of low-temperature setting of the woven fabric.

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