A heat-conducting fabric and its preparation method

Abstract

The present invention provides a heat-conducting fabric and a preparation method thereof. The heat-conducting fabric comprises a polyester face yarn, a bottom yarn and a connecting yarn; both the bottom yarn and the connecting yarn are nylon-covered polyester core-sheath structure yarns; the yarn specification ratio of the face yarn to the bottom yarn is 2-4:1; the yarn number ratio of the face yarn to the bottom yarn is 4-8:1. The fabric provided by the present invention uses polyester fine yarn as the face yarn, accounting for 50%-75%, which can improve the distribution ratio of moisture on the surface layer and achieve the effect of one-way moisture conduction; the bottom yarn is a nylon-covered polyester core-sheath structure yarn, and the nylon surface layer can conduct heat faster, realizing better thermal comfort. The experimental results show that: the thermal conductivity of the fabric is 0.092-0.103; the contact cool feeling is 0.23-0.26; the MMT after 20 washes is 3-4.

Description

Technical Field

[0001] The present invention belongs to the technical field of fabrics, and particularly relates to a heat-conducting fabric and a preparation method thereof. Background Art

[0002] With the improvement of living standards and the development of sports specialization, people's professional requirements for sportswear are getting higher and higher. The current research on sportswear mainly focuses on wet comfort, such as one-way moisture conduction technology. In the one-way moisture conduction technology, one type is called printed single conduction, that is, on the inner layer of the fabric, a combination of water-repellent points and hydrophilic points is formed by printing or spraying, etc., to form a contrast in the moisture distribution between the inner and outer layers, achieving the one-way moisture conduction effect, such as Patent CN 101845702; this method can achieve a good one-way moisture conduction effect, but it has no obvious effect on heat conduction and cooling, that is, good thermal comfort cannot be achieved.

[0003] In addition, another type uses polyester as the surface layer and polypropylene or polyethylene as the inner layer. Utilizing the fact that polyester has better hydrophilicity than polypropylene or polyethylene, a relatively good one-way moisture conduction effect is achieved, and at the same time, there is also a certain thermal comfort effect. However, since both polypropylene and polyethylene are not heat-resistant and cannot be dyed, most of them are presented as white yarns, resulting in poor fabric quality. In addition, it cannot undergo hot stamping and printing processes that require heating, and can only make very simple styles, so its use is very limited, which is also the reason why it cannot be widely used in daily life. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a heat-conducting fabric and a preparation method thereof, and this fabric has a good one-way moisture conduction effect and thermal comfort.

[0005] The present invention provides a heat-conducting fabric, including a polyester surface yarn;

[0006] a bottom yarn;

[0007] and a connecting yarn connecting the surface yarn and the bottom yarn;

[0008] The bottom yarn and the connecting yarn are independently selected from nylon-covered polyester core-spun yarns;

[0009] The yarn specifications of the surface yarn are 75D - 150D, the number of yarn filaments is 72F - 288F, the twist factor is 200 - 600, and the thermal conductivity is 0.08 - 0.1 W / (mK);

[0010] The yarn specifications of the nylon-covered polyester core-spun yarns are 30D - 75D, the number of yarn filaments is 12F - 48F, and the thermal conductivity is greater than 0.3 W / (mK).

[0011] Preferably, the yarn specifications of the polyester face yarn are 75D to 150D, the number of yarns is 72F to 288F, the twist factor is 200 to 600, and the thermal conductivity is 0.08 to 0.1 W / (mK);

[0012] The yarn specifications of the nylon-covered polyester core-spun yarn are 30D to 75D, the number of yarns is 12F to 48F, and the thermal conductivity is greater than 0.3 W / (mK).

[0013] Preferably, the weight ratio of nylon in the nylon-covered polyester core-spun yarn is 25 to 50%; the weight ratio of polyester is 50 to 75%;

[0014] The cross-section of the nylon-covered polyester core-spun yarn is a flat structure.

[0015] Preferably, the face yarn and the connecting yarn are used as the surface layer of the fabric;

[0016] In the surface layer, the weight ratio of the face yarn is 75 to 90%, and the weight ratio of the connecting yarn is 10 to 25%.

[0017] Preferably, 150D144F polyester is selected for the face yarn;

[0018] The nylon-covered polyester core-spun yarn is selected from 75D24F nylon-covered polyester core-spun yarn.

[0019] Preferably, the mass ratio of the face yarn to the total mass of the bottom yarn and the connecting yarn is 50 to 75:25 to 50.

[0020] The present invention provides a method for preparing the thermal conductive fabric described in the above technical solution, including the following steps:

[0021] Weave, dye, and finish the face yarn, bottom yarn, and connecting yarn to obtain a thermal conductive fabric.

[0022] Preferably, the temperature of the dyeing is 125 to 130 °C, the time is 40 to 50 min, and the pH value is 4.8 to 5.2.

[0023] Preferably, the finishing agent used for the finishing includes acetic acid, penetrant JFC, and cool feeling finishing agent ASTEX COOL-EX with a mass ratio of 0.45 to 0.55:1:18 to 32.

[0024] The present invention provides a heat-conducting fabric, which includes a polyester face yarn; a bottom yarn; and a connecting yarn connecting the face yarn and the bottom yarn; both the bottom yarn and the connecting yarn are nylon-covered polyester core-sheath structure yarns; the yarn specification ratio of the face yarn to the bottom yarn is 2-4:1; the yarn number ratio of the face yarn to the bottom yarn is 4-8:1. The fabric provided by the present invention uses fine polyester yarn as the face yarn, and the proportion is relatively large, which can improve the distribution ratio of moisture on the surface layer and achieve the effect of one-way moisture conduction; the bottom yarn is a nylon-covered polyester core-sheath structure yarn, and the nylon surface layer can conduct heat faster to achieve better thermal comfort. It also has good color fastness. The experimental results show that: the thermal conductivity of the fabric is 0.092-0.103; the contact cool feeling is 0.23-0.26; the MMT after 20 washes is 3-4. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural view of the heat-conducting fabric provided by the present invention, wherein, is the polyester face yarn, is the nylon-covered polyester core-sheath structure yarn;

[0026] Figure 2 is a schematic structural view of the nylon-covered polyester core-sheath structure yarn, wherein 1 is the sheath layer and 2 is the core layer. DETAILED DESCRIPTION OF THE INVENTION

[0027] The present invention provides a heat-conducting fabric, which includes a polyester face yarn;

[0028] a bottom yarn;

[0029] and a connecting yarn connecting the face yarn and the bottom yarn;

[0030] the bottom yarn and the connecting yarn are independently selected from nylon-covered polyester core-sheath structure yarns;

[0031] the yarn specification ratio of the face yarn to the bottom yarn is 2-4:1; the yarn number ratio of the face yarn to the bottom yarn is 4-8:1.

[0032] The heat-conducting fabric provided by the present invention includes a polyester face yarn; the yarn specification of the face yarn is preferably 75D-150D, the number of yarns is 72F-288F, the twist coefficient is 200-600, and the thermal conductivity is 0.08-0.1 W / (mK).

[0033] The heat-conducting fabric provided by the present invention includes a bottom yarn; the bottom yarn is selected from nylon-covered polyester core-spun yarn; the yarn specification of the nylon-covered polyester core-spun yarn is preferably 30D to 75D, the number of yarn filaments is 12F to 48F, and the thermal conductivity is greater than 0.3 W / (mK). The weight ratio of nylon in the nylon-covered polyester core-spun yarn is 25 to 50%; the weight ratio of polyester is 50 to 75%; the cross-section of the nylon-covered polyester core-spun yarn is a flat structure. In specific embodiments, the weight ratio of nylon in the nylon-covered polyester core-spun yarn is 30% or 40%; the weight ratio of polyester is 70% or 60%.

[0034] The yarn specification ratio of the surface yarn and the bottom yarn is 2 to 4:1; the yarn filament number ratio of the surface yarn and the bottom yarn is 4 to 8:1. In specific embodiments, the specification ratio of the surface yarn and the bottom yarn is 2:1; the yarn filament number ratio of the surface yarn and the bottom yarn is 6:1.

[0035] In the present invention, the surface yarn and the connecting yarn serve as the surface layer of the fabric; the weight ratio of the surface yarn in the surface layer is 75 to 90%, and the weight ratio of the connecting yarn is 10 to 25%. The polyester surface yarn mainly appears in the surface layer of the fabric, absorbs the sweat discharged from the bottom layer, evaporates on the surface, and takes away heat.

[0036] The present invention uses nylon-covered polyester core-spun yarn as the bottom yarn. Among them, nylon serves as the skin layer to conduct the body surface heat, and has a better thermal comfort control effect than printing with one-way moisture conduction; the core layer is polyester, which reduces the water absorption and water retention of nylon and improves the quick-drying performance of the yarn. It avoids the problem that pure nylon is not easy to dry.

[0037] The bottom yarn is nylon-covered polyester core-spun yarn, which is woven and appears inside the fabric, that is, the side close to the skin, forming a flat texture and can be in direct contact with the skin to instantly absorb the heat of the skin. The nylon-covered polyester core-spun yarn can continue to maintain the feel of polyester, overcome the deficiency of nylon being too slippery, and achieve the effect of being soft on the outside and firm on the inside, which better meets the requirements of sports fabrics. When dyeing, the inner layer of polyester can be dyed alone to obtain the effect of co-bath dyeing with the surface layer yarn, without secondary dyeing. Nylon is heat-resistant and can be heat-pressed and printed, avoiding the problem that polypropylene and polyethylene are not heat-resistant, and improving the wide applicability.

[0038] The connecting yarn connecting the two sides is nylon-covered polyester core-spun yarn, accounting for 10% to 25% in the fabric surface layer, and is used for heat conduction and heat dissipation and heat exchange with the surface yarn.

[0039] In a specific embodiment of the present invention, the surface yarn is selected as 150D 144F polyester; the nylon-covered polyester core-spun yarn is selected from 75D 24F nylon-covered polyester core-spun yarn.

[0040] The mass ratio of the surface yarn to the total mass of the bottom yarn and the connecting yarn is 50 to 75:25 to 50.

[0041] The present invention provides a method for preparing the heat-conducting fabric described in the above technical solution, comprising the following steps:

[0042] Weave, dye, and shape the face yarn, bottom yarn, and connecting yarn to obtain the heat-conducting fabric.

[0043] In the present invention, during the weaving process, the bottom yarn mainly appears on the inside of the fabric, i.e., the skin-contact surface, and forms a flat texture, which can be in direct contact with the skin and instantaneously absorb the heat of the skin; part of the connecting yarn appears on the surface. After conducting the heat out, it is in direct contact with the air, facilitating heat dissipation. The face yarn appears on the fabric surface layer, can absorb the sweat discharged from the bottom layer, and evaporates on the surface, taking away heat.

[0044] During the weaving process, the needle arrangement mode of the upper needles is AAAAAA, and the needle arrangement mode of the lower needles is AABCCB; where A, B, and C respectively represent knitting needles with three different needle heel heights; the arrangement of A, B, and C represents the order of the knitting needle arrangement, which is called needle arrangement. The number of courses during the weaving process refers to the number of yarn feeding ports of the weft knitting machine. Because the tissue cycle sizes are different, it generally does not exceed 24 courses. In the present invention, 10 courses are taken as a cycle, and polyester face yarn is fed in courses 1 - 5; nylon-covered polyester core-spun yarn is fed in courses 6 - 10.

[0045] In the present invention, the dyeing solution used for dyeing comprises 0.2 - 0.3 g / l of defoamer, 2 - 3 g / l of leveling agent, 0.9 - 1.1 g / l of anti-wrinkle agent, 0.45 - 0.55 g / l of dispersant, 0.4 - 0.5 wt% of pigment, and the balance of water; the addition amount of the pigment is based on the mass of the heat-conducting fabric, and the addition amounts of the defoamer, leveling agent, anti-wrinkle agent, and dispersant are based on the dyeing solution. The defoamer is preferably selected from CK-G054 of Tianjin Gaotian New Materials Co., Ltd.; the leveling agent is preferably selected from the high-temperature leveling agent Goon308 of Dongguan Jiahong Silicone Technology Co., Ltd.; the anti-wrinkle agent is preferably selected from the bath-in-bottle SX of Dongguan Sanxing High-Tech Materials Co., Ltd.; the dispersant is preferably JFC of Guangzhou Chunjia Trading Co., Ltd. The pigment is preferably selected from one or more of disperse dye red, disperse dye blue, and disperse dye yellow; more preferably selected from disperse red SE-GFL and / or disperse blue 2BLN.

[0046] In a specific embodiment, the dyeing solution used for dyeing comprises 0.25 g / l of defoamer CK-G054, 2.5 g / l of leveling agent Goon308, 1 g / l of anti-wrinkle agent, 0.5 g / l of dispersant, 0.4% of pigment, and the balance of water; or the dyeing solution used for dyeing comprises 0.25 g / l of defoamer, 2.5 g / l of leveling agent, 1 g / l of anti-wrinkle agent, 0.5 g / l of dispersant, 0.5% of pigment, and the balance of water.

[0047] In the present invention, the dyeing temperature is 125 - 130 °C, the dyeing time is 40 - 50 min, and the pH value is 4.8 - 5.2. In a specific embodiment, the dyeing temperature is 130 °C, the time is 45 min, and the pH value is 5.

[0048] In the present invention, the setting agent used for qualitative analysis includes acetic acid, penetrant, and cool feeling finishing agent with a mass ratio of 0.45 - 0.55:1:18 - 32; the model of the penetrant is preferably selected from JFC; the model of the cool feeling finishing agent is preferably selected from ASTEXCOOL-EX. In the present invention, the setting temperature is preferably 180 - 190 °C, and the vehicle speed used during setting is 14 - 16 m / min. In a specific embodiment, the setting temperature is 185 °C and the vehicle speed is 15 m / min.

[0049] To further illustrate the present invention, the following is a detailed description of a heat-conducting fabric and its preparation method provided by the present invention in combination with embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0050] Example 1 Polyester-covered Nylon-covered Polyester Bird's Eye Fabric

[0051] The overall processing technological process is: material selection - surface yarn twisting - weaving - dyeing - setting - finished product - testing;

[0052] 1. Yarn selection: The surface layer is 150D 144F polyester with a twist factor of 400, and the bottom layer is 75D 24F nylon-covered polyester yarn. In this core-spun yarn, the nylon in the surface layer accounts for 30%, and the polyester in the inner layer accounts for 70%;

[0053] 2. The fabric is woven using the weaving parameters shown in Table 1:

[0054] Table 1 Weaving Parameters Used in Example 1

[0055]

[0056] Among them, A, B, and C respectively represent knitting needles with three different heel heights. The arrangement of A, B, and C represents the order of the knitting needle arrangement, which is called needle arrangement; Yarn feeding 1 and 2 represent two different yarns, that is, the 1st - 5th passes feed No. 1 yarn, and the 6th - 10th passes feed No. 2 yarn. (In this example, No. 1 yarn is 150D 144F twisted polyester, and No. 2 yarn is 75D 24F nylon-covered polyester yarn); V, inverted V, and - respectively represent different knitting cams. V represents loop formation, and - represents float; The number of passes refers to the number of yarn feeding ports of the weft knitting machine. Because the size of the tissue cycle is different, it generally does not exceed 24 passes. In this example, 10 passes are a cycle.

[0057] 3. Dyeing: The dye liquor formula includes 0.25 g / l of defoamer, 2.5 g / l of leveling agent, 1 g / l of anti-wrinkle agent, 0.5 g / l of dispersant, 0.4% of Disperse Red SE-GFL, and the balance of water. The pH value is 5, the dyeing temperature is 130 °C, and the heat preservation is 45 min;

[0058] 4. The formula for post-finishing and setting includes 0.5 g / L of acetic acid, 1 g / L of penetrant JFC, 30 g / L of cool feeling finishing agent ASTEX COOL-EX (Toner Chemical). The setting temperature is 185 °C, and the vehicle speed is 15 m / min to obtain a heat-conducting fabric, that is, a polyester-covered nylon-covered polyester bird's eye fabric. The fabric quality is 110 g / m 2 .

[0059] Table 2 Conventional test results of polyester-covered nylon-covered polyester bird's eye fabric

[0060]

[0061]

[0062] Table 3 Functional test results of the heat-conducting fabric prepared in Example 1

[0063]

[0064] It can be seen from Table 2 that all the conventional physical and chemical indexes prepared in Example 1 meet the national standard requirements; it can be seen from Table 3 that the fabric prepared in this example has good unidirectional moisture conduction and moisture control performance, instant contact cool feeling performance, and continuous heat conduction and cooling performance.

[0065] Example 2 Polyester-covered nylon-covered polyester check fabric

[0066] The overall processing process flow is: material selection - weaving - dyeing and finishing - setting - finished product - testing;

[0067] 1. Yarn selection, the surface layer is 150D 144F polyester, and the bottom layer is 75D 24F nylon-covered polyester yarn, where the nylon accounts for 40% and the polyester accounts for 60%;

[0068] 2. The parameters of fabric weaving are shown in Table 4:

[0069] Table 4 Weaving parameters adopted in Example 2

[0070]

[0071] The weaving of Example 2 has a cycle of 10 paths. In the 1st, 2nd, 3rd, 4th, and 5th paths, Yarn No. 1 (150D 144F twisted polyester) is fed. In the 6th, 7th, 8th, 9th, and 10th paths, Yarn No. 2 (75D 24F nylon-covered polyester yarn) is fed. The upper needle arrangement is AAAAAA, and the lower needle arrangement is AABCCB. In the 1st and 5th paths, the upper needle knits in a loop, and the lower needle knits in a loop, floats, floats; in the 2nd, 3rd, and 4th paths, the upper needle knits in a loop, and the lower needle knits in a loop, knits in a loop, floats; in the 6th, 7th, 8th, 9th, and 10th paths, the upper needle is in a floating state, and the lower needle knits in a loop, knits in a loop, knits in a loop;

[0072] 3. Dyeing: The dye liquor formula for dyeing includes 0.25 g / l of defoamer, 2.5 g / l of leveling agent, 1 g / l of anti-wrinkle agent, 0.5 g / l of dispersant, 0.5 wt% of disperse dye blue 2BLN, and the balance of water. The pH value is 5, the dyeing temperature is 130 °C, and it is kept warm for 45 min.

[0073] 4. Post-treatment setting formula: 0.5 g / L of acetic acid, 1 g / L of penetrant JFC, 20 g / L of cool feeling finishing agent ASTEX COOL-EX. The setting temperature is 185 °C, and the vehicle speed is 15 m / min, obtaining a polyester-covered nylon-covered polyester checkered fabric with a fabric quality of 125 g / m 2 。

[0074] Table 5 Conventional test results of the polyester-covered nylon-covered polyester checkered fabric prepared in Example 2

[0075]

[0076]

[0077] Table 6 Functional test results of the polyester-covered nylon-covered polyester checkered fabric prepared in Example 2

[0078]

[0079] The test results show that all the conventional physical and chemical indexes meet the national standard requirements; the functional indexes show that the fabric of the present invention has good unidirectional moisture conduction and moisture control performance, instant contact cool feeling performance, and continuous heat conduction and cooling performance.

[0080] As can be seen from the above embodiments, the present invention provides a heat-conducting fabric, which includes a polyester face yarn; a bottom yarn; and a connecting yarn connecting the face yarn and the bottom yarn; both the bottom yarn and the connecting yarn are nylon-covered polyester core-sheath structure yarns; the yarn specification ratio of the face yarn to the bottom yarn is 2-4:1; the yarn number ratio of the face yarn to the bottom yarn is 4-8:1. The fabric provided by the present invention uses polyester fine yarn as the face yarn and has a relatively large proportion, which can improve the distribution ratio of moisture on the surface layer and achieve the effect of unidirectional moisture conduction; the bottom yarn is a nylon-covered polyester core-sheath structure yarn, and the nylon surface layer can conduct heat faster to achieve better thermal comfort. It also has good color fastness. The experimental results show that: the thermal conductivity of the fabric is 0.092-0.103; the contact cool feeling is 0.23-0.26; the MMT after 20 washes is 3-4.

[0081] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A heat-conducting fabric, characterized in that, It includes a polyester face yarn; a base yarn; and a connecting yarn connecting the face yarn and the base yarn; both the base yarn and the connecting yarn are nylon-covered polyester core-spun yarns; the yarn specification ratio of the face yarn to the base yarn is 2 to 4:1; the yarn number ratio of the face yarn to the base yarn is 4 to 8:1; the yarn specification of the polyester face yarn is 75D to 150D, the number of yarn ends is 72F to 288F, the twist factor is 200 to 600, and the thermal conductivity is 0.08 to 0.1 W / (mK); the yarn specification of the nylon-covered polyester core-spun yarn is 30D to 75D, the number of yarn ends is 12F to 48F, and the thermal conductivity is greater than 0.3 W / (mK); in the nylon-covered polyester core-spun yarn, the weight proportion of nylon is 25 to 50%; the weight proportion of polyester is 50 to 75%; the cross-section of the nylon-covered polyester core-spun yarn is a flat structure; the face yarn and the connecting yarn serve as the surface layer of the fabric; in the surface layer, the weight proportion of the face yarn is 75 to 90%, and the weight proportion of the connecting yarn is 10 to 25%.

2. The heat-conducting fabric according to claim 1, wherein The face yarn selects 150D / 144F polyester; the nylon-covered polyester core-spun yarn is selected from 75D / 24F nylon-covered polyester core-spun yarn.

3. The heat-conducting fabric according to claim 1, wherein The mass ratio of the quality of the face yarn to the total mass of the base yarn and the connecting yarn is 50 to 75:25 to 50.

4. A method for preparing the thermal conductive fabric according to any one of claims 1 to 3, comprising the following steps: Weave, dye and shape the face yarn, base yarn and connecting yarn to obtain the thermal conductive fabric.

5. The preparation method according to claim 4, characterized in that, The temperature of the dyeing is 125 to 130 °C, the time is 40 to 50 min, and the pH value is 4.8 to 5.

2.

6. The preparation method according to claim 4, characterized in that, The setting agent used for the shaping includes acetic acid, penetrant JFC and cool feeling finishing agent ASTEX COOL-EX with a mass ratio of 0.45 to 0.55:1:18 to 32.

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