Knitted fabric

Abstract

The invention discloses a knitted fabric. The fabric contains more than two yarns with different deniers, the yarn with the largest denier is the yarn A and the content of the yarn in the fabric is m1 wt%, the yarn with the smallest denier is the yarn B and the content of the yarn in the fabric is m2 wt%, and m1 and m2 meet the following relational expression: 1.0 < = m1 / m2 < = 9.0; the air permeability of the knitted fabric is T, the underfill coefficient is delta, and T and delta meet the following relational expression that T / delta is larger than or equal to 90 and smaller than or equal to 140. The knitted fabric disclosed by the invention has high air permeability and high anti-permeability, has a contact cool feeling and moisture absorption and quick-drying properties, and is particularly suitable for manufacturing T-shirts, polo shirts and the like by utilizing the processes of sewing, resin fitting and the like.

Description

Technical Field

[0001] This invention belongs to the field of textiles, and specifically relates to a knitted fabric. Background Technology

[0002] In recent years, the rise of outdoor sports has led to increasingly higher demands for the functionality of clothing. Among these, highly breathable knitted fabrics have become the first choice for outdoor enthusiasts, but problems such as poor breathability, reduced coldness upon contact, and low sweat absorption still need to be addressed.

[0003] For example, patent document CN109385737A discloses a water-absorbing and quick-drying knitted fabric. This fabric is a single-sided knitted fabric, including an outer layer and an inner layer with a textured surface. Additionally, the fabric has breathable holes with a size of 5×10 mm. 3 μm 2 ~30×10 3 μm 2 This fabric has excellent water absorption, quick-drying and breathability, making it comfortable to wear, but it has poor permeability and a weak cold feel when in contact with the skin.

[0004] For example, patent document CN106521784A discloses an elastic knitted fabric and its uses. Specifically, it discloses a fabric made of short fibers and filaments. The loop height formed by the short fibers is greater than that formed by the filaments, thus forming pores. After processing, it obtains good hand feel and breathability, but it also has the problems of poor impermeability and weak cold feel when in contact with the skin. Summary of the Invention

[0005] The purpose of this invention is to provide a moisture-wicking and quick-drying knitted fabric that is both highly breathable and highly breathable, and has a cooling sensation upon contact.

[0006] The technical solution of the present invention is as follows:

[0007] A knitted fabric contains two or more yarns with different finenesses, wherein the yarn with the largest fineness is yarn A and its content in the fabric is m1% by weight, and the yarn with the smallest fineness is yarn B and its content in the fabric is m2% by weight, and m1 and m2 satisfy the following relationship: 1.0 ≤ m1 / m2 ≤ 9.0; the air permeability of the knitted fabric is T, and the unfilled coefficient is δ, and T and δ satisfy the following relationship: 90 ≤ T / δ ≤ 140.

[0008] The knitted fabric of the present invention, through specific yarn selection and weave structure, yields a moisture-wicking and quick-drying knitted fabric that is both highly breathable and highly impermeable, and has a cool feel upon contact. Attached Figure Description

[0009] Figure 1This is a schematic diagram of the longitudinal cross-section of the single-sided structure of the present invention.

[0010] Figure 2 This is a schematic diagram of the transverse cross-section of the double-sided structure of the present invention. Detailed Implementation

[0011] The knitted fabric of this invention contains two or more yarns with different finenesses. The yarn with the finest fineness is yarn A, and its content in the fabric is m1% by weight. The yarn with the smallest fineness is yarn B, and its content in the fabric is m2% by weight. m1 and m2 satisfy the following relationship: 1.0 ≤ m1 / m2 ≤ 9.0. Within this range, a knitted fabric with both high breathability and high permeability can be obtained. If m1 / m2 < 1.0, the content of the yarn with the finest fineness, A, in the fabric is too low, and the content of the yarn with the smallest fineness, B, in the fabric is relatively high. With a fixed loop length, the structure formed by the excessively high content of fine yarns is loose, the porosity is increased, the breathability is good, but the permeability is poor. If m1 / m2 > 9.0, the content of the smallest fineness yarn B in the fabric is too low, while the content of the largest fineness yarn A in the fabric is relatively high. Under a fixed loop length, the fabric structure formed by weaving with too high a content of coarse fineness yarn is tight and has good impermeability, but poor breathability. Preferably, m1 and m2 satisfy the following relationship: 2.0 ≤ m1 / m2 ≤ 7.0.

[0012] The knitted fabric of this invention has a breathability rating of T and an unfilled coefficient of δ, where T and δ satisfy the following relationship: 90 ≤ T / δ ≤ 140. Wherein, δ = L0 / d, L0 is the loop length (mm), and d is the yarn diameter (μm). That is, the unfilled coefficient δ can be adjusted by the loop length L0 and the yarn diameter d. Increasing the loop length L0 and / or decreasing the yarn diameter d increases the unfilled coefficient δ; decreasing the loop length L0 and / or increasing the yarn diameter d decreases the unfilled coefficient δ.

[0013] Generally, a larger incompleteness coefficient results in a sparser fabric, with good breathability but poor impermeability; conversely, a smaller incompleteness coefficient results in a denser fabric, with poor breathability but good impermeability. The knitted fabric of this invention, on the one hand, utilizes the pathways formed between yarns of different fineness to allow airflow, improving the fabric's breathability T. Simultaneously, by adjusting the loop length L0 and yarn diameter d, the incompleteness coefficient δ is reduced, resulting in a denser fabric and improved impermeability. In this invention, the pathways formed between yarns can be obtained using yarns of different fineness, and further limitations on yarn cross-section and morphology can be made to achieve even better breathability and impermeability. If T / δ < 90, the fabric's breathability T is small, the incompleteness coefficient δ is large, the yarn arrangement is relatively dense, and while the fabric's impermeability and coldness upon contact increase, its breathability significantly decreases. If T / δ > 140, the fabric has a higher breathability (T) and a lower unfilled coefficient (δ), resulting in a looser yarn arrangement. This improves the fabric's breathability and moisture absorption / drying properties, but significantly reduces its anti-permeability and increases the risk of snagging. Preferably, T and δ satisfy the following relationship: 100 ≤ T / δ ≤ 120.

[0014] Preferably, in the knitted fabric of the present invention, the yarn is an irregularly shaped cross-section yarn, and its cross-section is one or more of the following: multi-leaf, Y-shaped, cross-shaped, triangular, or hollow. More preferably, the yarn cross-section is a flat multi-leaf shape with stable morphology, many grooves, and a large specific surface area; even more preferably, the yarn cross-section is a flat hexagonal shape or a flat octagonal shape. Using irregularly shaped cross-section yarns allows for the formation of more pathways between the yarns. The spaces formed by these pathways allow for greater airflow, thus improving the fabric's breathability. Furthermore, the irregularly shaped cross-section yarns increase diffuse reflection of light, improving the fabric's anti-seepage effect. Simultaneously, it also achieves better moisture absorption and quick-drying properties, and a cooling sensation upon contact.

[0015] Preferably, the knitted fabric of the present invention is a single-sided weave, and in the longitudinal cross-section of the fabric, the longest distance L between the continuous loops formed by the yarn A is... M The longest distance L between the continuous loops formed with the yarn B N The ratio is L1, and 0.15 ≤ L1 ≤ 0.90. Here, yarn A refers to the yarn with the highest fineness in the fabric, and yarn B refers to the yarn with the lowest fineness. The longest distance between consecutive loops formed by the yarns can characterize the tightness of the fabric. The longest distance here refers to the distance formed by the maximum number of yarns of the same fineness arranged in the longitudinal direction of the fabric. The ratio of these two distances is important for obtaining excellent breathability, light penetration, and a cool feel to the touch. The larger value is used as the denominator, and the smaller value is used as the numerator in the ratio calculation.

[0016] If L1 < 0.15, the longest distance between continuous loops formed by the finest yarn A is larger, resulting in a denser weave in the area formed by yarn A in the fabric. This tends to improve breathability and coolness upon contact, but reduces air permeability. Similarly, the longest distance between continuous loops formed by the finest yarn B is also larger, resulting in a looser weave in the area formed by yarn B in the fabric. This tends to improve air permeability and moisture absorption and quick-drying properties, but reduces breathability and coolness upon contact. If L1 > 0.90, the longest distance between continuous loops formed by the finest yarn A and the finest yarn B is similar. It's possible that both yarn A and yarn B form larger areas in the knitted fabric, with both tightly packed and loose areas being larger, leading to a decrease in the fabric's breathability and impermeability, and unstable fabric performance. Alternatively, it's possible that both yarn A and yarn B form smaller areas in the knitted fabric, resulting in a decrease in breathability and an increase in impermeability, with significant differences in yarn fineness, increased surface roughness, reduced contact area with the skin, and a decrease in the feeling of coolness upon contact.

[0017] Preferably, the knitted fabric of the present invention is a double-sided weave, wherein, in the transverse cross-section of the fabric, the distance L between individual loops of adjacent yarns of different fineness on one side of the fabric is... P The distance L between individual loops of yarns of different fineness adjacent to each other on the other side Q The ratio is L2, and 0.20 ≤ L2 ≤ 0.60. In this invention, L2 = L Q / L P And L P >L Q Within this range, knitted fabrics that combine high breathability and high permeability can be obtained. If L2 < 0.20, meaning the difference in distance between loops on both sides of the fabric is large, double-sided fabrics are prone to having one side tight and the other loose. Inconsistent fabric tightness results in less space for the pathways between yarns, potentially improving permeability but decreasing breathability; simultaneously, the fabric also carries the risk of snagging. If L2 > 0.60, the average distance between individual loops of adjacent yarns of different fineness on both sides of the fabric is similar. Small average distances between individual loops of adjacent yarns of different fineness on both sides result in a tight fabric, with a tendency for improved permeability but decreased breathability; large average distances between individual loops of adjacent yarns of different fineness on both sides result in a loose fabric, with a tendency for improved breathability but decreased permeability, and an increased risk of snagging. More preferably, 0.30 ≤ L2 ≤ 0.50.

[0018] Preferably, in the knitted fabric of the present invention, the fineness ratio between yarn A and yarn B is 1.5 to 3.0. The certain fineness difference between yarn A and yarn B allows for the formation of suitable ventilation channels, resulting in good breathability. If the fineness ratio is less than 1.5, the space for ventilation channels is too small, and the fabric's breathability tends to decrease. If the fineness ratio is greater than 3.0, the space for ventilation channels increases, leading to increased breathability but decreased impermeability. Furthermore, the large difference in yarn fineness increases the surface texture of the fabric, reducing the contact area with the skin and decreasing the coldness upon contact. More preferably, the fineness ratio between the finest yarn A and the finest yarn B is 1.8 to 2.4. The yarn fineness is 33 dtex to 144 dtex.

[0019] The raw material of the irregular cross-section yarn in this invention is not particularly limited and can be synthetic fiber or natural fiber, preferably one or more of polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polypropylene terephthalate (PTT), polyamide 6 (PA6), polyamide 66 (PA66), and polyamide 56 (PA56). More preferably, it is polyethylene terephthalate fiber.

[0020] The irregular cross-section yarn in this invention is not particularly limited in shape and can be either filament or staple fiber yarn, preferably filament.

[0021] The knitted fabric of this invention can be single-sided or double-sided. Single-sided knit can be plain weave, mesh weave, etc., while double-sided knit can be cotton-wool weave, Roman weave, rib weave, etc.

[0022] Preferably, the knitted fabric of the present invention has a permeability of 93.0% or higher. The higher the permeability value, the better the permeability.

[0023] Preferably, the porosity of the knitted fabric of the present invention is 5.0% to 15.0%. A higher porosity results in better air permeability but reduced impermeability; a lower porosity results in better impermeability but reduced air permeability.

[0024] Preferably, the knitted fabric of the present invention has a Qmax of 0.15 or higher for its cooling sensation upon contact. The higher the value, the better the cooling effect upon contact.

[0025] The knitted fabric of this invention has both high breathability and high permeability, as well as excellent coolness to the touch and moisture-wicking and quick-drying properties, making it particularly suitable for making running T-shirts, polo shirts, etc.

[0026] The knitted fabric of this invention can be knitted using a circular knitting machine. The number of needles and size of the circular knitting machine are not particularly limited; it can be a double-sided or single-sided machine of 32G34", 32G36", 36G34", 36G38", 28G34", or 28G36", preferably a 32G34" or 32G36" circular knitting machine. The knitting structure can be one of plain weave, mesh weave, cotton-wool weave, Roman weave, or rib weave. The yarn arrangement in the single-sided or double-sided weave can be one of 1:1, 1:2, 1:3, 1:4, 1:5, 4:5, 2:3, 1:1:1, or 1:1:2. Preferably, the yarn arrangement in the double-sided weave is 1:1, 1:2, or 1:3.

[0027] The processing method for the knitted fabric of this invention is not particularly limited. Scouring, dyeing, setting, and finishing processes all employ conventional processing conditions. The scouring agent, dyeing acid, hydrophilic agent, and softener used in each process of this invention can be commercially available products or self-prepared products. The preferred dosages are scouring agent, dyeing acid, hydrophilic agent (paddling), and softener.

[0028] The present invention will be further described below with reference to embodiments and comparative examples. The testing methods for each parameter involved in the present invention are as follows:

[0029] The present invention will be further described below with reference to embodiments and comparative examples. The testing methods for each parameter involved in the present invention are as follows:

[0030] (1) Determination of yarn fineness

[0031] First, take a piece of full-width knitted fabric to be tested (vertical length 50 cm), and extract a single yarn from the fabric in the order from top to bottom and from left to right, and measure its yarn length, which is recorded as X (unit: m).

[0032] Then, the weight of the single yarn is recorded as Y (in grams). Finally, the fineness of the yarn is calculated using the following formula:

[0033] Fineness D = X / 9000Y

[0034] Unit: Daniel (hereinafter referred to as D).

[0035] (2) Determination of yarn content in fabric

[0036] First, take a piece of full-width knitted fabric to be tested (50 cm in length), and extract 144 yarns in the order from top to bottom and from left to right (because the maximum number of cycles of the circular knitting machine is 144, this sampling method is to ensure the comprehensiveness of the sampling and the accuracy of the data).

[0037] Then, all the extracted yarns are distinguished and calculated. The fineness is measured in accordance with the above "(1) Yarn Fineness Measurement" to obtain the fineness of various yarns in the fabric. The yarn with the largest fineness is yarn A, and it is weighed and recorded as m1 (weight %). The yarn with the smallest fineness is yarn B, and it is weighed and recorded as m2 (weight %).

[0038] Finally, the ratio of m1 to m2 is calculated.

[0039] (3) Determination of yarn cross-sectional shape

[0040] The paraffin embedding method was used, and the specific testing procedure is as follows:

[0041] ① Place two L-shaped metal sheets, each 1cm high, together to form a groove-shaped mold. The openings on the two metal sheets should be positioned opposite each other, allowing the yarn to be tested to rest vertically on them. The metal sheets have openings spaced 1cm apart along their length, with each opening being 2 / 3 the height of the metal sheet.

[0042] ② Dissolve solid paraffin wax as an embedding agent into a liquid state, and slowly inject it into a metal mold to penetrate into the yarn.

[0043] ③ After the paraffin wax solidifies, separate the L-shaped metal sheet to demold.

[0044] ④ Divide the demolded paraffin strips into samples, ensuring that each yarn to be tested is centered on the paraffin block. Then heat one side of the paraffin block perpendicular to the yarn and attach it to a small wooden block of suitable size for the slicing machine.

[0045] ⑤ Using the yarn as the center, trim the paraffin block into a cone shape (four-sided cone), with the end of the yarn away from the wooden block at the top of the cone.

[0046] ⑥ Place the small wooden block on the slicer to continuously slice the conical paraffin block.

[0047] ⑦ Transfer the cut slices to a glass slide and heat them on a heating stage. The heating conditions should be such that "the paraffin on the slices is completely melted and the yarn is completely exposed." For example, set the heating stage temperature to 90℃ and preheat for 5 minutes.

[0048] ⑧ Adjust the digital microscope (VXH-6000) to a suitable magnification (e.g., 500x) to ensure a clear field of view. Observe and record the cross-sectional morphology at this magnification.

[0049] (4) Ventilation

[0050] According to GB / T 5453-1997, the standard for determining the air permeability of fabrics.

[0051] (5) Incomplete coefficient

[0052] δ=L0 / d

[0053] Where: L0 is the coil length, and d is the yarn diameter;

[0054] d: Disassemble 100 loop lengths of yarn from the fabric to be tested, and apply a pretension of 0.1 g / D to flatten the yarn. Using a KEYENCE VHX-2000 digital microscope, adjust the magnification to ZS20:X100, and click to measure the distance between two points to obtain the perpendicular straight-line distance between the two edges of the yarn. Randomly select test points on the yarn at certain intervals to obtain 100 data points, and take the average value. Repeat the same method to extract a total of 10 yarns, and take the average value of 10 data points for each yarn. The average value is taken as the yarn diameter d.

[0055] L0: Count 100 loops on the fabric to be tested and mark the end of each loop. Remove the yarn and apply a pretension of 0.1 g / D to flatten it. Using a KEYENCE VHX-2000 digital microscope, adjust the magnification to ZS20:X100, click to measure the distance between two points, measure the actual distance between adjacent marks, and take the average of 100 data points. Repeat this process to extract 10 yarns, and take the average of 10 data points for each yarn. Use the average of these 10 data points as the loop length L0.

[0056] (6) Calculation of L1

[0057] a. Cut a 1cm*1cm (horizontal*vertical) single-sided knitted fabric as a sample, and attach the sample with the longitudinal section facing up on the sample table for later use.

[0058] b. Place the small sample stage with the sample in the sample chamber of the Thermoscientific Apreo2C scanning electron microscope (SEM) for testing.

[0059] c. Click "Test", select an appropriate magnification (e.g., X25), choosing a magnification that provides a clear view. Click the device's built-in test function, and take the tangent circles of the leftmost and rightmost yarn sections forming the loop from the yarn with the highest fineness (A). Mark the centers of these circles as points a1 and a2. Connect a1 and a2 to obtain a straight line M. Measure the length of straight line M and record it as L. M .

[0060] Take the tangent circles of the leftmost and rightmost cross-sections of the yarn with the smallest fineness, B, and mark their centers as points b1 and b2 respectively. Connect b1 and b2 to obtain a straight line N, and measure the length of the straight line N, denoted as L. N .

[0061] d. with L M and L N The smaller value is used as the numerator, and the larger value is used as the denominator to calculate L1.

[0062] e. Repeat the above steps 5 times and take the average value of L1 to get the result.

[0063] (7) Calculation of L2

[0064] a. Cut a 1cm*1cm (horizontal*vertical) double-sided knitted fabric as a sample, and attach the sample with the longitudinal section facing up on the sample table for later use.

[0065] b. Place the small sample stage with the sample in the sample chamber of the Thermoscientific Apreo2C scanning electron microscope (SEM) for testing.

[0066] c. Click “Test”, select an appropriate magnification (e.g., X25), the magnification should be selected for clear visibility, click the built-in test function of the device, take a single loop of adjacent yarns of different fineness on one side (the result of test method (6)), the tangent circle of the cross section of the yarn on the left and the tangent circle of the cross section of the yarn on the right, and take their centers respectively, and mark them as points c1 and c2; connect c1 and c2 to get the distance between the boundaries of the two circles as a straight line P, measure the length of the straight line P, and record it as L. P The average distance formed by individual loops of all yarns with different fineness on the same surface is taken and denoted as L. P平均 ;

[0067] Take a single loop of adjacent yarns of different fineness on one side, and the tangent circles of the cross-sections of the left and right yarns. Mark the centers of these circles as points d1 and d2 respectively. Connect d1 and d2 to obtain the distance between the boundaries of the two circles, which is a straight line Q. Measure the length of straight line Q and record it as L. Q The average distance formed by individual loops of all yarns with different fineness on the same surface is taken and denoted as L. Q平均 (Results of test method (6))

[0068] d. with L P平均 and L Q平均 The smaller value is used as the numerator, and the larger value is used as the denominator to calculate L2.

[0069] e. Repeat the above steps 5 times and take the average of L2 values ​​to obtain the result.

[0070] (8) Permeability test

[0071] First, cut a 10cm x 10cm (horizontal x vertical) piece of the fabric to be tested as sample A. Place sample A on a standard white board and test it using a colorimeter (specification: datacolor Spectro1050) to obtain the L value, which is recorded as L. 白 ;

[0072] Then, sample A was placed on a standard blackboard and tested using a colorimeter (specification: datacolor Spectro1050) to obtain the L value, which was recorded as L. 黑 ;

[0073] Finally, according to the principle of impermeability = (L 黑 / L 白 )*100% calculation.

[0074] Repeat the above steps 10 times, and take the average of the 10 results as the final result.

[0075] (9) Porosity

[0076] Cut 20 pieces of fabric measuring 10cm x 10cm (horizontal * vertical) as samples. Perform a light transmittance test using a KEYENCE VHX-2000 digital microscope. Lay one sample flat under the microscope, turn the light transmittance knob to 70%, click "Measurement & Annotation" on the screen, then click "Automatic Area Measurement," select "Brightness (Recommended)," and click "Start Measurement." Confirm that the area to be tested is 100%, and click "Next" to display the total area percentage result.

[0077] Repeat the above steps 20 times, and take the average of the 20 times as the final result.

[0078] (10) Contact with cold sensation

[0079] According to GB / T 35263-2017 Standard for Testing and Evaluation of Instant Cooling Properties of Textiles upon Contact (11) Evaporation Rate Test Method

[0080] According to GB / T21655-2023, the standard for determining the evaporation rate of moisture absorption and quick-drying properties (GB single item combination three). The higher the value, the better the moisture absorption and quick-drying properties.

[0081] Example 1

[0082] The knitting was performed on a 32G34” double-sided circular knitting machine, using 84T / 72f flat eight-leaf PET DTY yarn (66.8% by weight in the fabric) as yarn A, and 44T / 24f flat eight-leaf PET... FDY yarn (33.2% by weight in the fabric) is yarn B, with a cotton-wool weave. Yarn A has a loop length of 187 mm, and yarn B has a loop length of 172 mm. Yarn A and yarn B are woven in a 1:1 ratio to obtain the greige fabric. This fabric undergoes pretreatment (80℃*20min, scouring agent 2g / L), dyeing (disperse dyeing, 130℃*30min), color fixing (color fixing temperature 80℃*20min, color fixing agent 2g / L), drying (setting machine temperature 130℃*2min), finishing processing (water-absorbing quick-drying agent 10g / L), and finally finishing (setting temperature 170℃*2min) to obtain the knitted fabric of this invention, as detailed in Table 1.

[0083] Example 2

[0084] The fabric was woven on a 32G36” single-sided circular knitting machine with a plain weave structure to obtain the greige fabric. The loop lengths of yarns A and B were 187 mm, and other details were the same as in Example 1, resulting in the knitted fabric of the present invention, as shown in Table 1.

[0085] Example 3

[0086] 84T / 72f flat eight-leaf PET DTY yarn (48.0% by weight in the fabric) was selected as yarn A, and 44T / 24f flat eight-leaf PET FDY yarn (52.0% by weight in the fabric) was selected as yarn B. Yarn A and yarn B were knitted in a 1:2 ratio, and the rest was the same as in Example 1, to obtain the knitted fabric of the present invention, as shown in Table 1.

[0087] Example 4

[0088] 84T / 72f flat eight-leaf PET DTY yarn (89.9% by weight in the fabric) was selected as yarn A, and 44T / 24f flat eight-leaf PET FDY yarn (10.1% by weight in the fabric) was selected as yarn B. Yarn A and yarn B were knitted in a 5:1 ratio, and the rest was the same as in Example 1, to obtain the knitted fabric of the present invention, as shown in Table 1.

[0089] Example 5

[0090] The knitted fabric of the present invention was obtained by selecting 84T / 72f cross-type PET DTY yarn (66.8% by weight in the fabric) as yarn A and 44T / 24f cross-type PET FDY yarn (33.2% by weight in the fabric) as yarn B, as detailed in Table 1.

[0091] Example 6

[0092] 84T / 72f flat eight-leaf PET DTY yarn (88.4% by weight in the fabric) was selected as yarn A, and 44T / 24f flat eight-leaf PET FDY yarn (11.6% by weight in the fabric) was selected as yarn B. Yarn A and yarn B were knitted in a 4:1 ratio, and the rest was the same as in Example 2, to obtain the knitted fabric of the present invention, as shown in Table 1.

[0093] Example 7

[0094] 84T / 72f flat eight-leaf PET DTY yarn (56.0% by weight in the fabric) was selected as yarn A, and 44T / 24f flat eight-leaf PET FDY yarn (44.0% by weight in the fabric) was selected as yarn B. Yarn A and yarn B were knitted in a 2:3 ratio, and the rest was the same as in Example 2, to obtain the knitted fabric of the present invention, as shown in Table 1.

[0095] Example 8

[0096] The length of yarn A loop is 177mm, the length of yarn B loop is 162mm, and the rest is the same as in Example 1, thus obtaining the knitted fabric of the present invention, as shown in Table 1.

[0097] Example 9

[0098] The length of yarn A loop is 194 mm, the length of yarn B loop is 182 mm, and the rest is the same as in Example 1, thus obtaining the knitted fabric of the present invention, as shown in Table 2.

[0099] Example 10

[0100] 84T / 72f flat eight-leaf PET DTY yarn (60.0% by weight in the fabric) was selected as yarn A and 56T / 36f flat eight-leaf PET FDY yarn (40.0% by weight in the fabric) was selected as yarn B. The rest was the same as in Example 1, and the knitted fabric of the present invention was obtained, as shown in Table 2.

[0101] Example 11

[0102] 132T / 96f flat eight-leaf PET DTY yarn (75.0% by weight in the fabric) was selected as yarn A and 44T / 24f flat eight-leaf PET FDY yarn (25.0% by weight in the fabric) was selected as yarn B. The rest was the same as in Example 1, and the knitted fabric of the present invention was obtained, as shown in Table 2.

[0103] Example 12

[0104] 56T / 36f flat eight-leaf PET FDY yarn was selected as yarn C, and the content of each yarn in the fabric was adjusted, that is, the content of yarn A was 46% by weight, the content of yarn B was 24% by weight, and the content of yarn C was 30% by weight. Yarn A: yarn B: yarn C were arranged in a 1:1:1 ratio for weaving, and the rest was the same as in Example 1, to obtain the knitted fabric of the present invention, as shown in Table 2.

[0105] Example 13

[0106] Yarn A is made of 84T / 72f hollow PA6 DTY yarn (66.8% by weight in the fabric) and yarn B is made of 44T / 24f hollow PA6 FDY yarn (33.2% by weight in the fabric). The process includes dyeing (acid dye dyeing, 98℃*30min), fixing (80℃*20min, nylon fixing agent 2g / L), and drying (setting machine temperature 130℃).

[0107] *2min), followed by finishing processing (10g / L nylon water-absorbing quick-drying agent), and finally finishing by setting (setting temperature 180℃*2min), the rest is the same as in Example 1, to obtain the knitted fabric of the present invention, as shown in Table 2.

[0108] Example 14

[0109] The weave is Roman weave, and the rest is the same as in Example 1, resulting in the knitted fabric of the present invention, as detailed in Table 2.

[0110] Example 15

[0111] 84T / 72f circular PET DTY yarn (66.8% by weight in the fabric) was selected as yarn A and 44T / 24f circular PET FDY yarn (33.2% by weight in the fabric) was selected as yarn B. The rest was the same as in Example 1, and the knitted fabric of the present invention was obtained, as shown in Table 2.

[0112] Example 16

[0113] 56T / 36f flat eight-leaf PET DTY yarn (content in fabric is 89.5% by weight) is selected as yarn A and 33T / 12f flat eight-leaf PET FDY yarn (content in fabric is 10.5% by weight) is selected as yarn B. Yarn A and yarn B are knitted in a 5:1 ratio, and the rest is the same as in Example 2, to obtain the knitted fabric of the present invention, as shown in Table 2.

[0114] Example 17

[0115] 84T / 72f flat eight-leaf PET DTY yarn (54.4% by weight in the fabric) was selected as yarn A, and 44T / 24f flat eight-leaf PET FDY yarn (45.6% by weight in the fabric) was selected as yarn B. Yarn A and yarn B were arranged in a 4:5 ratio and woven in the same manner as in Example 2 to obtain the knitted fabric of the present invention, as shown in Table 3.

[0116] Example 18

[0117] The length of yarn A loop is 170mm, the length of yarn B loop is 156mm, and the rest is the same as in Example 1, to obtain the knitted fabric of the present invention, as shown in Table 3.

[0118] Example 19

[0119] The length of yarn A loop is 199mm, the length of yarn B loop is 188mm, and the rest is the same as in Example 1, to obtain the knitted fabric of the present invention, as shown in Table 3.

[0120] Example 20

[0121] A 132T / 96f flat eight-leaf PET DTY yarn (80.0% by weight in the fabric) was selected as yarn A, and a 33T / 12f flat eight-leaf PET FDY yarn (20.0% by weight in the fabric) was selected as yarn B. The loop length of yarn A was 188mm, and the loop length of yarn B was 174mm. The rest was the same as in Example 1, and the knitted fabric of the present invention was obtained. See Table 3 for details.

[0122] Example 21

[0123] A 56T / 36f flat eight-leaf PET DTY yarn (56.0% by weight in the fabric) was selected as yarn A, and a 44T / 24f flat eight-leaf PET FDY yarn (44.0% by weight in the fabric) was selected as yarn B. The loop length of yarn A was 184mm, and the loop length of yarn B was 170mm. The rest was the same as in Example 1, and the knitted fabric of the present invention was obtained. See Table 3 for details.

[0124] Comparative Example 1

[0125] A knitted fabric was obtained by selecting 84T / 72f flat eight-leaf PET DTY yarn (48.8% by weight in the fabric) and 44T / 24f flat eight-leaf PET FDY yarn (51.2% by weight in the fabric). Yarn A and yarn B were knitted in a 2:4 ratio, and the rest was the same as in Example 1. The details are shown in Table 3.

[0126] Comparative Example 2

[0127] A knitted fabric was obtained by selecting 84T / 72f flat eight-leaf PET DTY yarn (content in the fabric is 90.6% by weight) and 44T / 24f flat eight-leaf PET FDY yarn (content in the fabric is recorded as 9.4% by weight). Yarn A: Yarn B were knitted in a 5:9 ratio, and the rest was the same as in Example 1. The details are shown in Table 3.

[0128] Comparative Example 3

[0129] A knitted fabric was obtained by selecting 84T / 72f flat eight-leaf PET DTY yarn (48.8% by weight in the fabric) and 44T / 24f flat eight-leaf PET FDY yarn (51.2% by weight in the fabric). Yarn A and yarn B were knitted in a 2:4 ratio, and the rest was the same as in Example 2. The details are shown in Table 3.

[0130] Comparative Example 4

[0131] A knitted fabric was obtained by selecting 84T / 72f flat eight-leaf PET DTY yarn (content in the fabric is 90.6% by weight) and 44T / 24f flat eight-leaf PET FDY yarn (content in the fabric is recorded as 9.4% by weight). Yarn A: Yarn B were knitted in a 5:9 ratio, and the rest was the same as in Example 2. See Table 3 for details.

[0132]

[0133]

[0134]

[0135] According to Tables 1, 2, and 3,

[0136] (1) As can be seen from Comparative Example 1 and Example 3, under the same conditions, the double-sided knitted fabric with m1 / m2 of 0.9 and T / δ of 145 has poorer permeability than the double-sided knitted fabric with m1 / m2 of 1.0 and T / δ of 140. The breathability, coldness upon contact and moisture absorption and quick-drying properties of the two are comparable.

[0137] (2) As can be seen from Comparative Example 2 and Example 4, under the same conditions, the double-sided knitted fabric with m1 / m2 of 9.6 and T / δ of 88 is less breathable, less permeable, less cold to the touch, and less moisture-wicking and quick-drying than the double-sided knitted fabric with m1 / m2 of 8.9 and T / δ of 90.

[0138] (3) As can be seen from Comparative Example 3 and Example 2, under the same conditions, the single-sided knitted fabric with m1 / m2 of 0.9 and T / δ of 145 has better permeability and coldness to the touch than the single-sided knitted fabric with m1 / m2 of 2.0 and T / δ of 108.

[0139] (4) As can be seen from Comparative Example 4 and Example 2, under the same conditions, compared with the single-sided knitted fabric with m1 / m2 of 9.6 and T / δ of 89 and m1 / m2 of 2.0 and T / δ of 108, the former has poorer breathability, impermeability and moisture absorption and quick-drying properties, while the two have similar contact coldness.

[0140] (5) As can be seen from Example 5 and Example 1, under the same conditions, the double-sided knitted fabric with a cross-section of yarn has a less cold feel than the double-sided knitted fabric with a flat eight-leaf cross-section. The breathability, breathability and moisture absorption and quick-drying properties of the two are comparable.

[0141] (6) As can be seen from Examples 15 and 1, under the same conditions, the double-sided knitted fabric with a circular yarn cross section is less breathable, less permeable, less cold to the touch, and less moisture-wicking and quick-drying than the double-sided knitted fabric with a flat eight-lobed yarn cross section.

Claims

1. A knitted fabric, characterized by: The fabric contains two or more yarns with different finenesses. The yarn with the finest fineness is yarn A, and its content in the fabric is m1% by weight. The yarn with the smallest fineness is yarn B, and its content in the fabric is m2% by weight. m1 and m2 satisfy the following relationship: 1.0 ≤ m1 / m2 ≤ 9.

0. The air permeability of the knitted fabric is T, and the unfilled coefficient is δ. T and δ satisfy the following relationship: 90 ≤ T / δ ≤ 140.

2. The knitted fabric according to claim 1, characterized in that: The yarn is an irregularly shaped cross-section yarn, and its cross-section is one or more of the following: multi-leaf shape, Y-shape, cross shape, triangle shape, and hollow shape.

3. The knitted fabric according to claim 1 or 2, characterized in that: The knitted fabric is a single-sided weave. In the longitudinal cross-section of this fabric, the longest distance L between the continuous loops formed by the yarn A is... M The longest distance L between the continuous loops formed with the yarn B N The ratio is L1, and 0.15≤L1≤0.

90.

4. The knitted fabric according to claim 1 or 2, characterized in that: The knitted fabric is a double-sided weave. In the transverse cross-section of the fabric, the distance L between individual loops of adjacent yarns of different fineness on one side of the fabric is... P The distance L between individual loops of yarns of different fineness adjacent to each other on the other side Q The ratio is L2, and 0.20≤L2≤0.

60.

5. The knitted fabric according to claim 1 or 2, characterized in that: The fineness ratio of yarn A to yarn B is 1.5 to 3.

0.

6. The knitted fabric according to any one of claims 1 to 5, characterized in that: The knitted fabric has a permeability of 93.0% or higher.

7. The knitted fabric according to any one of claims 1 to 5, characterized in that: The porosity of the knitted fabric is 5.0% to 15.0%.

8. The knitted fabric according to any one of claims 1 to 5, characterized in that: The Qmax of the contact coldness of the knitted fabric is above 0.15.

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