Knitted fabric with damp-heat dynamic adjusting function and thermal underwear

Abstract

The invention belongs to the technical field of textiles, and discloses a knitted fabric with a damp-heat dynamic adjusting function and thermal underwear. The knitted fabric comprises a surface layer, a middle layer and an inner layer, the surface layer is formed by weaving first yarn, the first yarn comprises moisture absorption and sweat releasing fibers, the inner layer is formed by weaving second yarn, the middle layer is connecting yarn interwoven between the surface layer and the inner layer, the connecting yarn forms a tuck structure between the surface layer and the inner layer, the surface layer adopts plain weave, and the inner layer adopts plain weave. The underfill coefficient of the surface layer is 8-15, the inner layer adopts eyelet weave, and the coverage coefficient of the inner layer is 0.1-0.5. According to the knitted fabric, microclimate adjustment can be carried out according to the heat change of the human body, damp-heat balance dynamic adjustment in different states is achieved, in addition, the problem that the fabric is accumulated on specific parts of the human body after sports can be solved, and the knitted fabric has good wearing comfort.

Description

Technical Field

[0001] The present invention belongs to the technical field of textiles, and particularly relates to a knitted fabric and a thermal underwear with a function of dynamically adjusting humidity and heat. Background Art

[0002] Traditional thermal underwear mainly achieves the thermal insulation effect by using fleece fabrics or fabrics with an air layer. However, most of these fabrics use non-absorbent chemical fibers as raw materials. The reason is that fiber materials with moisture absorption usually have a cool feeling when worn, while using non-absorbent chemical fibers as raw materials can achieve the thermal insulation effect. Currently, polyester fiber and acrylic fiber are more commonly used. Traditional thermal underwear has the following problems: (1) During exercise, as the amount of exercise of the human body gradually increases or the temperature rises, the heat and water vapor generated by the human body are difficult to transfer to the outside through the thermal underwear, resulting in the problem of stuffy wearing; (2) In order to achieve a better shaping effect, more elastic fibers are often added to the thermal underwear. The elastic fibers can deform to fit the human body when the amount of exercise is small, but they will move up when the amount of exercise is large. After exercise, because the elastic fabric is in close contact with the skin, the friction force between the fabric and the human skin is too large to recover, resulting in the problem of fabric accumulation in specific parts of the human body.

[0003] Therefore, there is an urgent need to develop a product with good thermal insulation, air permeability, reduced accumulation, and improved wearing comfort. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the above-mentioned prior art. For this purpose, the present invention provides a flame-retardant and high-strength knitted fabric and textile. The knitted fabric described in the present invention has excellent thermal insulation and air permeability effects, and at the same time can reduce the problem of fabric accumulation after exercise, and has good wearing comfort.

[0005] In the first aspect of the present invention, a knitted fabric is provided, which includes a surface layer, an intermediate layer, and a lining layer. The surface layer is woven from a first yarn, the first yarn includes a moisture-absorbing and sweat-wicking fiber, the lining layer is woven from a second yarn, the intermediate layer is a connecting yarn interwoven between the surface layer and the lining layer, the connecting yarn forms a tuck structure between the surface layer and the lining layer, the surface layer adopts a plain weave, the filling coefficient of the surface layer is 8-15, the lining layer adopts a mesh weave, and the covering coefficient of the lining layer is 0.1-0.5.

[0006] Specifically, when the human body is in a cold or low-movement state, the mesh tissue structure in the inner layer forms numerous tiny holes for storing static air, and the dense structure of the plain weave on the surface layer serves to prevent heat dissipation, thereby enhancing the heat preservation effect of the fabric. When the human body is in a warm or high-movement state, the human body generates excessive heat and humidity. At this time, the mesh tissue structure in the inner layer forms a heat and humidity exchange channel, and the moisture-absorbing and sweat-wicking fibers used in the surface layer can quickly conduct the heat and humidity out. The dense plain weave expands the moisture-absorbing and sweat-wicking area, which is more conducive to the discharge of heat and humidity. Therefore, the knitted fabric of the present invention realizes the dynamic adjustment of heat and humidity balance under different states. Moreover, the lower covering coefficient of the inner-layer mesh reduces the contact area between the fabric and the skin, thereby reducing the friction between the fabric and the skin, which is beneficial to improving the discomfort caused by the upward movement and accumulation of the fabric when the human body is in high-intensity exercise.

[0007] The surface layer of the knitted fabric of the present invention adopts a plain weave. The fabric woven with a plain weave has a large covering area. When the human body is in a cold or low-movement state, it can prevent the diffusion of temperature and exert an excellent heat preservation effect. When the human body is in a warm or high-movement state, it has a large diffusion ratio area and can quickly diffuse the water vapor generated by the human body to the outside, further solving the problem of stuffiness caused by the increase in human body temperature.

[0008] The moisture-absorbing and sweat-wicking fibers described in the present invention refer to fibers that can quickly absorb the sweat and other water vapor discharged from the human skin and quickly conduct it to the outside. Such fibers usually do not have hydrophilic groups and are not easy to combine with water molecules to form stable chemical bonds to store water. Their fiber cross-sections are usually special cross-sections, such as cross-shaped and Y-shaped cross-sections. These special fiber cross-sections make the fibers have grooves, and the grooves can produce capillary effects and wicking effects to quickly drain water vapor. At the same time, due to the existence of the grooves, the fibers have a large specific surface area, which can more efficiently diffuse water vapor and can quickly discharge the water vapor and heat after the human body temperature rises, solving the uncomfortable problem of stuffiness. When the surface plain weave contains moisture-absorbing and sweat-wicking fibers, it can absorb the excessive heat and humidity generated by the human body and quickly discharge it to the outside, ensuring the comfort of the human microenvironment.

[0009] The unfilled coefficient described in the present invention refers to the ratio of the coil length of the knitted fabric to the yarn diameter. It represents the influence of the linear density of the yarn on the density of the knitted fabric under the same density conditions. The larger the unfilled coefficient, the larger the space in the fabric that is not filled with yarn, and the sparser the fabric; on the contrary, the smaller the unfilled coefficient, the denser the fabric.

[0010] When the surface layer's underfill coefficient is between 8 and 15, the surface fabric structure is dense. When the body is cold or experiencing low activity levels, minimal sweat is produced. The dense fabric effectively locks in heat, while the moisture-wicking fibers prevent it from wicking away heat. The dense plain weave structure provides excellent warmth retention. When the body is warm or experiencing high activity levels, the dense fabric has a larger diffusion area, better dissipating sweat and heat to the outside, effectively alleviating the problem of stuffiness and providing a refreshing and comfortable wearing experience.

[0011] When the surface underfill coefficient is less than 8, the surface of the fabric is too dense. First, the overly dense structure affects the transfer of moisture and heat. Although the surface diffusion specific surface area increases, which is beneficial for removing moisture and heat, the interaction between the two does not significantly improve the transfer effect of moisture and heat, and may even reduce it. Second, the high weave density makes weaving difficult and difficult to prepare. When the surface underfill coefficient is greater than 15, the fabric is relatively sparse, failing to dynamically regulate the moisture and heat of the human body under different temperatures and environments. In particular, when the human body is in a low-temperature environment, temperature and heat are easily lost, resulting in poor warmth retention.

[0012] The inner layer described in the present invention adopts a mesh tissue, which refers to a knitted fabric structure with regular holes or grids. When the human body is in a cold or low-exercise state, the meshes and holes of the mesh tissue can cut out numerous small spaces in the inner layer of the fabric. These small spaces can store a large amount of still air, and still air has the lowest thermal conductivity among all substances, and can exert an excellent warming effect. When the human body is warm or has a high level of exercise, the meshes and holes become channels for transporting water vapor and heat to the outside world, which can realize the rapid transport of water vapor and heat to the outside world, and can effectively solve the problem of stuffiness caused by increased body temperature.

[0013] The coverage coefficient mentioned in the present invention refers to the ratio of the total area of the inner layer yarn to the area of the entire fabric. This indicator can reflect the coverage of the yarn contained in the inner layer on the entire fabric. The larger the coverage coefficient, the larger the fabric area covered by the yarn, which also means that the prepared garment has a larger contact area with human skin when worn. Conversely, the smaller the coverage coefficient, the smaller the fabric area covered by the yarn, and the smaller the contact area of the prepared garment with human skin when worn.

[0014] The present invention defines that the covering coefficient of the inner layer is between 0.1 and 0.5. The mesh-structured fabric prepared within this covering coefficient range has more meshes and holes. When the human body is in a cold environment or has a low exercise volume, these meshes and holes can store more static air, endowing the fabric with excellent heat preservation effect. When the human body is in a warm environment or has a high exercise volume, these meshes and holes can form channels for water vapor and heat to transfer to the outside world, enabling the rapid transfer of water vapor and heat to the outside, and effectively solving the problem of stuffiness caused by the increase in body temperature. In addition, the mesh-structured fabric prepared within this covering coefficient range can reduce the contact area between the inner layer of the thermal underwear and the human skin, thereby reducing the friction between the thermal underwear and the human skin, which is beneficial to improving the discomfort caused by the upward movement and accumulation of the underwear during high-intensity exercise.

[0015] When the covering coefficient of the inner layer < 0.1, the meshes and holes formed by the mesh structure are relatively large, and the gas fluidity inside the fabric is relatively large, resulting in a small storage capacity of static air. When the human body is in a cold environment or has a low exercise volume, the heat preservation effect of the prepared thermal underwear is poor.

[0016] When the covering coefficient of the inner layer > 0.5, the meshes and holes formed by the mesh structure are relatively small, and the stored static air is less. When the human body is in a cold environment or has a low exercise volume, the heat preservation effect of the prepared thermal underwear is poor. In addition, when the human body is in a warm environment or has a high exercise volume, the channels formed by the meshes and holes are relatively small, and the heat and water vapor generated by the human body are difficult to quickly transfer to the outside world, easily causing the problem of stuffy wearing. In addition, under this covering coefficient, the contact area between the mesh structure and the human skin is relatively large, and the friction between the fabric and the human skin is relatively large, which is likely to cause discomfort during high-intensity exercise due to the upward movement and accumulation of the underwear.

[0017] In some embodiments of the present invention, the moisture-absorbing and sweat-discharging fiber is Coolmax. Coolmax fiber is a functional fiber with moisture-absorbing and sweat-discharging properties developed by DuPont. Its fiber cross-section is cross-shaped and has a four-channel structure, which can quickly conduct sweat and moisture away from the skin surface and disperse them to the outer layer of the fabric for evaporation. By adding Coolmax fiber to the fabric, the present invention can improve the air permeability and moisture-absorbing and sweat-discharging properties of the fabric, achieving the effect of dry and comfortable wearing.

[0018] In some embodiments of the present invention, the meshes of the mesh structure are formed by elongating the loops, and adjacent meshes are composed of elongating loops of different lengths. The number of cross-rows of the elongating loops is 3 - 8 rows.

[0019] Specifically, the elongated coil part forms meshes. By using elongated coils of different lengths, meshes of different sizes will be formed. Compared with meshes of uniform size, meshes of different sizes have a synergistic effect, enabling better heat preservation at low temperatures and better heat transfer under high humidity and heat. When the elongated coil spans 3 - 8 rows, this synergistic effect is optimal and it is easy to knit.

[0020] In some embodiments of the present invention, the linear densities of the first yarn, the second yarn, and the connecting yarn are all 10 tex - 32 tex.

[0021] Specifically, for the yarn within this linear density range, the prepared fabric is relatively soft. When used for preparing close-fitting clothes such as thermal underwear, the fabric has a moderate thickness, is comfortable to wear for most consumers, and the mechanical properties of the yarn itself can meet the usage needs of most consumers. At the same time, the weaving difficulty is low, and there will be no situations such as broken yarns or dropped stitches.

[0022] When the linear densities of the first yarn, the second yarn, and the connecting yarn < 10 tex, the yarn is relatively thin, and the overall prepared fabric is relatively light and thin, with poor heat preservation performance and low mechanical properties. At the same time, it is more difficult to weave a double-layer fabric with thinner yarns, and there are prone to situations such as broken yarns or dropped stitches.

[0023] When the linear densities of the first yarn, the second yarn, and the connecting yarn > 32 tex, the yarn is relatively thick, and the overall prepared fabric is relatively thick and heavy, with poor wearing comfort. At the same time, the prepared fabric has poor air permeability, hindering the transfer of heat and water vapor generated after the human body warms up to the outside, and unable to effectively solve the stuffy problem after the human body warms up.

[0024] In some embodiments of the present invention, the linear density of the first yarn is 1.1 - 1.3 times that of the second yarn.

[0025] Specifically, restricted by the existing double-sided weft knitting machines, in order to ensure the tight knitting of the surface layer, using a thicker first yarn is beneficial to improving the tightness of the surface layer and reducing the underfill coefficient of the surface layer. And a thicker first yarn is beneficial to improving the wear resistance of the fabric and is also more conducive to fabric knitting.

[0026] In some embodiments of the present invention, the linear density of the connecting yarn is 0.5 - 0.9 times that of the second yarn.

[0027] Specifically, the connecting yarn is used to connect the surface layer and the inner layer, and it is not exposed on the front and back sides of the fabric. However, because the inner layer uses a mesh structure and has poor covering performance, using a thinner connecting yarn will reduce the exposure of the connecting yarn and ensure the beauty of the fabric. And when the linear density of the connecting yarn is less than half of that of the second yarn, it is prone to breakage, resulting in fabric instability.

[0028] In some embodiments of the present invention, the moisture regain of the second yarn is 6%-10%.

[0029] Specifically, in winter, the human skin is relatively dry. Wearing thermal underwear made of non-absorbent chemical fibers is likely to cause problems such as skin chapping and dandruff shedding. Therefore, the second yarn has a moisture regain of 6%-10%. The yarn itself can store a part of water vapor, ensuring that the fabric prepared therefrom has certain humidity performance, capable of adjusting the space humidity between the human body and the thermal underwear, ensuring that the human skin is within a suitable humidity range, and solving the problems of skin chapping and easy dandruff shedding caused by dry skin in winter. At the same time, the yarn with a moisture regain of 6%-10% has excellent moisture absorption performance, can quickly absorb the water vapor generated after the human body warms up, ensure the dryness and comfort of the human skin, and further solve the problem of stuffiness generated after the human body temperature rises. And it can reduce the accumulation of static electricity on the fiber surface and improve the wearing comfort.

[0030] The second yarn of the present invention is used for knitting the inner layer and needs to be in contact with the human body when worn. When the moisture regain is between 6%-10%, it can have both comfort and warmth retention. When the moisture regain is less than 6%, the comfort of the fabric is greatly affected; when the moisture regain is greater than 10%, the warmth retention of the fabric will be affected. Especially in the initial stage of wearing, the cool feeling caused by the large moisture regain greatly affects the warmth retention.

[0031] In some embodiments of the present invention, the second yarn includes at least one of phase change fiber, cellulose fiber, lyocell fiber, and seaweed fiber.

[0032] In some embodiments of the present invention, by mass percentage, the second yarn includes 20%-40% of phase change fiber and 60%-80% of cellulose fiber.

[0033] Specifically, the phase change fiber refers to a fiber that absorbs or releases heat through phase change and automatically adjusts the temperature. When the ambient temperature rises, the phase change material in the phase change fiber changes from solid to liquid and absorbs heat; when the temperature drops, it changes from liquid to solid and releases heat. This fiber can adjust the microclimate of the human body according to the change of the external temperature, and can generate heat and keep warm when the body temperature is low, and relieve stuffiness when the body temperature is high.

[0034] The cellulose fiber refers to a fiber with cellulose as the main component, which can effectively absorb and lock moisture, maintain the humidity of the human wearing area, and at the same time has a soft texture, can fit the skin, and has strong skin-friendly performance.

[0035] In some embodiments of the present invention, by mass percentage, the second yarn includes 20%-40% of phase change fiber and 60%-80% of lyocell fiber.

[0036] Specifically, the moisture regain rate of Lyocell fiber is as high as 13%, with excellent moisture absorption and moisture retention performance, which can maintain the humidity when worn by the human body. At the same time, it belongs to regenerated cellulose fiber, has a soft texture, and has a small friction force when contacting the human skin, which can effectively solve the problem of skin flakes caused by dry weather in winter. Lyocell fiber also has the characteristic of fibrillation, which can form tiny villi, which is beneficial to warmth retention and can better absorb sweat.

[0037] In some embodiments of the present invention, by mass percentage, the second yarn comprises 10%-25% of phase change fiber, 60%-80% of Lyocell fiber, and 10%-15% of seaweed fiber.

[0038] Specifically, seaweed fiber has a good antibacterial effect, and the initial modulus of seaweed fiber is low, which can effectively improve the comfort of the inner layer, reduce the stiffness of the yarn, and is more conducive to weaving. Adding seaweed fiber to the second yarn makes it have a good antibacterial effect. Since the second yarn only weaves the inner layer of the fabric, the proportion of seaweed fiber in the whole fabric is reduced, thus saving costs.

[0039] In some embodiments of the present invention, the phase change fiber comprises intelligent temperature regulating fiber.

[0040] In some embodiments of the present invention, the cellulose fiber comprises cotton fiber and / or hemp fiber.

[0041] In some embodiments of the present invention, the first yarn further comprises a composite fiber of polytrimethylene terephthalate and polyethylene terephthalate.

[0042] In some embodiments of the present invention, by mass percentage, the first yarn comprises 70%-90% of moisture-absorbing and sweat-evaporating fiber and 10%-30% of a composite fiber of polytrimethylene terephthalate and polyethylene terephthalate.

[0043] Specifically, the composite fiber of polytrimethylene terephthalate and polyethylene terephthalate (elastic fiber) has high elasticity and high resilience. It deforms when subjected to external force and returns to a state close to the original state after the external force disappears. Adding elastic fiber can make the prepared thermal underwear fit the human skin better and have better wearing comfort; at the same time, the addition of elastic fiber makes the fabric have more excellent tensile properties, which can better meet the movement needs of people when wearing thermal underwear in winter, allowing people to move freely during exercise or daily activities without a sense of restraint.

[0044] The polytrimethylene terephthalate and polyethylene terephthalate composite fiber used in the present invention is T400 fiber. T400 fiber is a new type of elastic composite fiber, a bicomponent fiber made of two different polyester fibers. The elasticity of this fiber is 2-5 times that of ordinary PET filaments. Even after multiple stretches, the elastic recovery rate can still remain above 95%, which can effectively meet the performance requirements of thermal underwear for elasticity.

[0045] In the second aspect of the present invention, there is provided a thermal underwear, which is prepared from the knitted fabric described in the first aspect of the present invention.

[0046] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0047] (1) The knitted fabric provided by the present invention can adjust the microclimate according to the heat change of the human body, realizing the dynamic adjustment of the wet and heat balance in different states. In addition, it can reduce the problem of fabric accumulation at specific parts of the human body after exercise, and has good wearing comfort.

[0048] (2) The knitted fabric provided by the present invention has excellent warmth retention and breathability effects. Among them, the clo value is 0.68-0.87, and the moisture permeability is 6200-7500 g / (m 2 ·24h). Detailed Embodiments

[0049] The content of the present invention will be further described in detail below through specific embodiments. Unless otherwise specified, the raw materials used in the embodiments can be obtained from conventional commercial channels or can be obtained by existing technical methods. Unless otherwise specified, the test or measurement methods are all conventional methods in the art.

[0050] Example 1

[0051] A knitted fabric, including a surface layer, an intermediate layer and a lining layer;

[0052] The surface layer is a plain weave structure woven from the first yarn. The first yarn uses 100% Coolmax fiber with a linear density of 150D, and the unfilled coefficient of the surface layer is 13;

[0053] The lining layer is a four-mode piqué mesh structure woven from the second yarn. The second yarn uses 100% cotton fiber with a linear density of 14.8 tex, and the covering coefficient of the lining layer is 0.41;

[0054] The intermediate layer is a connecting yarn interwoven between the surface layer and the lining layer. The connecting yarn forms a tuck structure between the surface layer and the lining layer, and the connecting yarn uses polyester filament with a linear density of 100D.

[0055] Example 2

[0056] A knitted fabric, comprising a surface layer, an intermediate layer and a lining layer;

[0057] The surface layer is a plain weave structure woven from a first yarn. The first yarn is 100% Coolmax fiber with a linear density of 150D, and the underfilling coefficient of the surface layer is 13;

[0058] The lining layer is an alternating mesh structure of spanning 4 rows and spanning 6 rows woven from a second yarn. The second yarn is 100% cotton fiber with a linear density of 14.8 tex, and the covering coefficient of the lining layer is 0.35;

[0059] The intermediate layer is a connecting yarn interwoven between the surface layer and the lining layer. The connecting yarn forms a loop structure between the surface layer and the lining layer, and the connecting yarn is made of polyester filament with a linear density of 100D.

[0060] Example 3

[0061] A knitted fabric, comprising a surface layer, an intermediate layer and a lining layer;

[0062] The surface layer is a plain weave structure woven from a first yarn. The first yarn is 100% Coolmax fiber with a linear density of 150D, and the underfilling coefficient of the surface layer is 13;

[0063] The lining layer is an alternating mesh structure of spanning 4 rows and spanning 6 rows woven from a second yarn. The second yarn is 75% cotton fiber and 25% intelligent temperature-regulating fiber with a linear density of 14.8 tex, and the covering coefficient of the lining layer is 0.35;

[0064] The intermediate layer is a connecting yarn interwoven between the surface layer and the lining layer. The connecting yarn forms a loop structure between the surface layer and the lining layer, and the connecting yarn is made of polyester filament with a linear density of 100D.

[0065] Example 4

[0066] A knitted fabric, comprising a surface layer, an intermediate layer and a lining layer;

[0067] The surface layer is a plain weave structure woven from a first yarn. The first yarn is 100% Coolmax fiber with a linear density of 150D, and the underfilling coefficient of the surface layer is 13;

[0068] The lining layer is an alternating mesh structure of spanning 4 rows and spanning 6 rows woven from a second yarn. The second yarn is 70% Lyocell fiber and 30% intelligent temperature-regulating fiber with a linear density of 14.8 tex, and the covering coefficient of the lining layer is 0.35;

[0069] The middle layer is the connecting yarn interwoven between the surface layer and the inner layer. The connecting yarn forms a tuck structure between the surface layer and the inner layer, and the connecting yarn is made of polyester filament with a linear density of 100D.

[0070] Example 5

[0071] A knitted fabric, comprising a surface layer, a middle layer and an inner layer;

[0072] The surface layer is a plain weave structure woven from the first yarn. The first yarn is made of 100% Coolmax fiber with a linear density of 150D, and the unfilled coefficient of the surface layer is 13;

[0073] The inner layer is an alternating mesh structure spanning 4 rows and 6 rows woven from the second yarn. The second yarn is made of 70% lyocell fiber, 18% intelligent temperature-regulating fiber and 12% seaweed fiber with a linear density of 14.8 tex, and the covering coefficient of the inner layer is 0.35;

[0074] The middle layer is the connecting yarn interwoven between the surface layer and the inner layer. The connecting yarn forms a tuck structure between the surface layer and the inner layer, and the connecting yarn is made of polyester filament with a linear density of 100D.

[0075] Example 6

[0076] A knitted fabric, comprising a surface layer, a middle layer and an inner layer;

[0077] The surface layer is a plain weave structure woven from the first yarn. The first yarn is made of 80% Coolmax fiber and 20% T400 fiber with a linear density of 150D, and the unfilled coefficient of the surface layer is 13;

[0078] The inner layer is a four-mode piqué mesh structure woven from the second yarn. The second yarn is made of 100% cotton fiber with a linear density of 14.8 tex, and the covering coefficient of the inner layer is 0.41;

[0079] The middle layer is the connecting yarn interwoven between the surface layer and the inner layer. The connecting yarn forms a tuck structure between the surface layer and the inner layer, and the connecting yarn is made of polyester filament with a linear density of 100D.

[0080] Example 7

[0081] A knitted fabric, comprising a surface layer, a middle layer and an inner layer;

[0082] The surface layer is a plain weave structure woven from the first yarn. The first yarn is made of 100% Coolmax fiber with a linear density of 100D, and the unfilled coefficient of the surface layer is 10;

[0083] The inner layer is a six-mode piqué mesh structure woven from the second yarn. The second yarn is 100% cotton fiber with a linear density of 10 tex, and the covering coefficient of the inner layer is 0.35;

[0084] The middle layer is a connecting yarn interwoven between the surface layer and the inner layer. The connecting yarn forms a loop structure between the surface layer and the inner layer, and the connecting yarn is made of polyester filament with a linear density of 75 D.

[0085] Example 8

[0086] A knitted fabric, including a surface layer, a middle layer and an inner layer;

[0087] The surface layer is a plain weave structure woven from the first yarn. The first yarn is 100% Coolmax fiber with a linear density of 100 D, and the unfilled coefficient of the surface layer is 8;

[0088] The inner layer is a mesh structure woven from the second yarn. The second yarn is 100% cotton fiber with a linear density of 10 tex, and the covering coefficient of the inner layer is 0.15;

[0089] The middle layer is a connecting yarn interwoven between the surface layer and the inner layer. The connecting yarn forms a loop structure between the surface layer and the inner layer, and the connecting yarn is made of polyester filament with a linear density of 75 D.

[0090] Comparative Example 1

[0091] A knitted fabric, the first yarn is 100% Coolmax fiber with a linear density of 150 D, the second yarn is 100% cotton fiber with a linear density of 14.8 tex, and double rib knitting is used for weaving.

[0092] Performance Test

[0093] The knitted fabrics prepared in Examples 1-8 and Comparative Example 1 were tested respectively according to the following test methods; among them, the grammage of the knitted fabrics prepared in Examples 1-6 and Comparative Example 1 was 300 g / m 2 , and the grammage of the knitted fabrics prepared in Examples 7-8 was 260 g / m 2 .

[0094] 1. The test method for the heat preservation effect is: GB / T 11048-2018 Determination of Thermal Resistance and Moisture Resistance of Textiles under Steady-State Conditions of Physiological Comfort.

[0095] 2. The test method for the air permeability and moisture permeability effect is: GB / T 12704.1-2009 Test Method for Moisture Permeability of Textiles - Part 1: Moisture Absorption Method, with the surface layer of the double-layer fabric as the test surface.

[0096] 3. The method for testing the elastic elongation effect is: FZ / T 70006-2022 "Test Method for Tensile Elastic Recovery Rate of Knitted Fabrics", and the test is carried out by applying a predetermined force of 50 N.

[0097] 4. The method for testing the moisture regain is: GB / T 9995-1997 "Determination of Moisture Content and Moisture Regain of Textile Materials - Oven Drying Method".

[0098] The above test results are shown in Table 1.

[0099] Table 1

[0100]

[0101]

[0102] As can be seen from Table 1, the knitted fabrics prepared in Examples 1-8 of the present invention have significantly higher Clo values and moisture permeability rates than the fabric prepared in Comparative Example 1, indicating that the knitted fabrics of the present invention have excellent warmth retention and air permeability effects; at the same time, the knitted fabrics of the present invention also have good elasticity and moisture absorption properties.

[0103] In addition, for the knitted fabric prepared in Example 5, referring to GB / T 20944.3-2008 "Evaluation of Antibacterial Properties of Textiles - Part 3: Oscillation Method", the antibacterial effect was tested, and the results are shown in Table 2.

[0104] Table 2

[0105]

[0106] As can be seen from Table 2, the knitted fabric of Example 5 added seaweed fiber, which not only has no adverse effect on the warmth retention and air permeability effects, but also further has good antibacterial effects.

[0107] The above has specifically described the preferred embodiments of the present invention, but the present invention is not limited to the above embodiments. Those skilled in the art can also make various equivalent variations or substitutions without departing from the spirit of the present invention, and these equivalent variations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A knitted fabric, characterized in that, The knitted fabric includes a surface layer, an intermediate layer, and a lining layer. The surface layer is woven from a first yarn, and the first yarn includes moisture-absorbing and sweat-wicking fibers. The lining layer is woven from a second yarn, and the intermediate layer is a connecting yarn interwoven between the surface layer and the lining layer. The connecting yarn forms a tuck structure between the surface layer and the lining layer. The surface layer adopts a plain weave, and the underfilling coefficient of the surface layer is 8-15. The lining layer adopts a mesh weave, and the covering coefficient of the lining layer is 0.1-0.

5.

2. The knitted fabric according to claim 1, characterized in that, The mesh of the mesh weave is formed by elongating the loops, and adjacent meshes are composed of elongating loops of different lengths. The number of courses spanned by the elongating loops is 3-8 rows.

3. The knitted fabric according to claim 1, characterized in that, The linear densities of the first yarn, the second yarn, and the connecting yarn are all 10 tex - 32 tex.

4. The knitted fabric according to claim 1, characterized in that, The linear density of the first yarn is 1.1 - 1.3 times that of the second yarn.

5. The knitted fabric according to claim 1, characterized in that, The linear density of the connecting yarn is 0.5 - 0.9 times that of the second yarn.

6. The knitted fabric according to claim 1, characterized in that, The moisture regain of the second yarn is 6% - 10%.

7. The knitted fabric according to claim 1, wherein, The second yarn includes at least one of phase change fibers, cellulose fibers, lyocell fibers, and seaweed fibers.

8. The knitted fabric according to claim 7, characterized in that, The cellulose fibers include cotton fibers and / or hemp fibers.

9. The knitted fabric according to claim 1, characterized in that The first yarn further includes a composite fiber of polytrimethylene terephthalate and polyethylene terephthalate.

10. A thermal underwear, characterized in that, The thermal underwear is prepared from the knitted fabric according to any one of claims 1-9.

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