Warm-keeping jean fabric as well as preparation method and clothing thereof

Abstract

The invention relates to a warm-keeping jean fabric, a preparation method thereof and clothes. The preparation method of the warm-keeping jean fabric comprises the following steps: weaving warp yarns and weft yarns to obtain a jean fabric pre-finished product; the weft yarns are core-spun yarns, each core-spun yarn comprises a yarn core and an outer covering layer covering the outer surface of the yarn core, and the yarn core is made of thermofuse fibers; carrying out heat setting treatment on the jean fabric pre-finished product; the temperature of the heat setting treatment is higher than or equal to the melting point of the thermal fuse and lower than the melting point of the yarn of the outer cladding layer. According to the preparation method, the covering yarn with the thermofuse fiber as the yarn core is adopted as the yarn in the warp yarn or the weft yarn; in the heat setting process, the heat setting temperature is higher than or equal to the temperature of the heat fuse fibers, and the heat fuse fibers are fused, so that a hollow structure is formed, and the heat preservation effect is improved. Furthermore, the hot melt is adhered to the inner side of the outer wrapping layer, so that the hollow structure is not easy to collapse, and the warm-keeping effect of the jean fabric is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of textiles, in particular to a warm denim fabric and a preparation method thereof, and clothing. Background Art

[0002] In recent years, with the progress of society and the improvement of people's living standards, people's demand for denim fabrics has gradually developed in the direction of functionality, for example, the demand for denim fabrics with warmth retention. Traditional denim warm fabrics mainly achieve the purpose of warmth retention by increasing the number of denim fabric layers, such as using double or more layers of denim fabrics. However, the increase in the number of layers will make the denim fabric thicker and heavier, reducing the comfort of wearing. Summary of the invention

[0003] Based on this, it is necessary to provide a warm denim fabric and a preparation method thereof, and clothing. The warm denim fabric has a good warming effect and is not heavy.

[0004] In a first aspect of the present application, a method for preparing a warm denim fabric is provided, comprising the following steps:

[0005] Weaving warp yarns and weft yarns to obtain a denim fabric pre-finished product; at least one of the warp yarns and the weft yarns contains a core-spun yarn, the core-spun yarn includes a yarn core and an outer covering layer covering the outer surface of the yarn core, and the yarn core is a hot-melt fiber;

[0006] The denim fabric pre-finished product is subjected to a heat setting treatment; the temperature of the heat setting treatment is higher than or equal to the melting point of the hot-melt fiber and lower than the melting point of the yarn of the outer covering layer.

[0007] In the above preparation method, a core-spun yarn with a hot-melt fiber as the yarn core is used as the yarn in the warp or weft, and the denim fabric pre-finished product woven from the warp and weft is subjected to a heat setting treatment, and the temperature conditions of the heat setting treatment are controlled; during the heat setting process, the heat setting temperature is higher than or equal to the temperature of the hot-melt fiber, and the hot-melt fiber melts to form a hollow structure; the yarn with a hollow structure can reduce heat conduction and improve the warmth-keeping effect. Furthermore, the hot melt adheres to the inner side of the outer covering, so that the hollow structure is not easy to collapse, further improving the warmth-keeping effect of the denim fabric.

[0008] In some embodiments, the melting point of the thermal melt fiber is 80°C-100°C.

[0009] In some embodiments, the temperature of the heat setting treatment is 90°C to 100°C.

[0010] In some embodiments, the speed of the heat setting treatment is 20 m / min to 30 m / min.

[0011] In some embodiments, the core-spun yarn satisfies at least one of the following conditions:

[0012] (1) The cross-sectional area of ​​the yarn core accounts for 5% to 15% of the cross-sectional area of ​​the core-spun yarn;

[0013] (2) The yarn core is selected from at least one of polyester fiber and nylon fiber;

[0014] (3) The yarn of the outer covering layer comprises a blended yarn formed by 65wt%~80wt% of thermal insulation fiber and 20wt%~35wt% of hygroscopic fiber; the thermal insulation fiber is selected from at least one of volcanic rock fiber, wool fiber and acrylic fiber; the hygroscopic fiber is selected from at least one of viscose fiber, cotton fiber and lyocell fiber.

[0015] In some embodiments, the weft yarn is the core-spun yarn; and / or the warp yarn is pure cotton yarn, cotton blended yarn or elastic core-spun yarn formed by cotton fiber covering an elastic yarn core.

[0016] In some embodiments, the preparation method satisfies at least one of the following conditions:

[0017] (1) The yarn count of the warp yarn is 8S~16S;

[0018] (2) The yarn count of the weft yarn is 8S to 16S;

[0019] (3) The weave structure of the thermal denim fabric is twill weave, plain weave or satin weave.

[0020] In some embodiments, the weave structure of the thermal denim fabric is a three-up-one-down twill weave.

[0021] The second aspect of the present application provides a warm denim fabric, which is prepared by the method described in the first aspect; or,

[0022] The warm denim fabric includes warp yarns and weft yarns woven together, at least one of the warp yarns and the weft yarns contains core-spun yarns, the core-spun yarns include a yarn core and an outer covering layer covering the outer surface of the yarn core, the yarn core is a hollow structure, and the wall material of the yarn core is melted hot melt wire.

[0023] A third aspect of the present application provides a garment comprising the warm denim fabric described in the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are merely embodiments of the present application, and ordinary technicians in this field can obtain other drawings based on the disclosed drawings without paying any creative work.

[0025] Figure 1 Schematic diagram of the core-spun yarn structure provided in one embodiment.

[0026] Figure 2 This is the organizational structure diagram of the warm denim fabric prepared in Example 1.

[0027] Description of reference numerals:

[0028] 10. core-spun yarn; 1. outer covering; 2. yarn core; 100. warm denim fabric; 11. warp yarn; 12. weft yarn. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of the present invention, the present invention is described more comprehensively below. And preferred embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. It should be understood that the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0031] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] The weight of the relevant components mentioned in the description of the embodiments of the present invention may not only refer to the specific content of each component, but also indicate the weight ratio between the components. Therefore, as long as the content of the relevant components is proportionally enlarged or reduced according to the description of the embodiments of the present invention, it is within the scope disclosed in the description of the embodiments of the present invention. Specifically, the weight described in the description of the embodiments of the present invention may be a mass unit known in the chemical industry such as μg, mg, g, kg, etc.

[0033] In one embodiment of the present application, a method for preparing a warm denim fabric is provided, comprising the following steps S10 to S20.

[0034] S10, weaving the warp yarn and the weft yarn to obtain a denim fabric pre-finished product;

[0035] Wherein, at least one of the warp yarn and the weft yarn contains a core-spun yarn 10 (such as Figure 1 As shown in the figure, the core-spun yarn 10 includes a yarn core 2 and an outer covering 1 coated on the outer surface of the yarn core, and the yarn core 2 is a hot melt fiber.

[0036] S20, performing heat setting treatment on the denim fabric pre-finished product; the temperature of the heat setting treatment is higher than or equal to the melting point of the hot-melt fiber and lower than the melting point of the yarn of the outer sheath.

[0037] In the above preparation method, the core-spun yarn 10 with the hot-melt fiber as the yarn core 2 is used as the yarn in the warp or weft, and the denim fabric pre-finished product woven from the warp and weft is subjected to heat setting treatment, and the temperature conditions of the heat setting treatment are controlled; during the heat setting process, the heat setting temperature is higher than or equal to the temperature of the hot-melt fiber, and the hot-melt fiber melts, thereby forming a yarn with a hollow structure; the yarn with a hollow structure can reduce heat conduction and improve the warmth-keeping effect. Furthermore, the hot melt adheres to the inner side of the outer covering, so that the hollow structure is not easy to collapse, further improving the warmth-keeping effect of the denim fabric.

[0038] In some embodiments, the melting point of the hot-melt fibers is 80°C to 100°C.

[0039] In some embodiments, the temperature of the heat setting treatment is 90° C. to 100° C. As an example, the temperature of the heat setting treatment may be 90° C., 91° C., 92° C., 93° C., 94° C., 95° C., 96° C., 97° C., 98° C., 99° C., or 100° C. Further, the temperature of the heat setting treatment may be a range value consisting of any two of the above point values ​​as end values.

[0040] In some embodiments, the speed of the heat setting treatment is 20m / min~30m / min. As an example, the speed of the heat setting treatment can be 20m / min, 21m / min, 22m / min, 23m / min, 24m / min, 25m / min, 26m / min, 28m / min or 30m / min. Preferably, the speed of the heat setting treatment is 20m / min~25m / min. The speed of the heat setting treatment refers to the moving speed of the fabric when the fabric is heat-set in the heat setting machine. By controlling the speed of the heat setting treatment, the melting effect of the hot melt can be controlled, and then the hollow effect of the yarn can be controlled, thereby controlling the warmth retention effect of the denim fabric.

[0041] In some embodiments, on the same cross section of the core-spun yarn 10, the cross-sectional area of ​​the yarn core 2 accounts for 5% to 15% of the cross-sectional area of ​​the core-spun yarn 10. As an example, the cross-sectional area of ​​the yarn core 2 may account for 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14% or 15% of the cross-sectional area of ​​the core-spun yarn 10. Further, the cross-sectional area of ​​the yarn core 2 as a percentage of the cross-sectional area of ​​the core-spun yarn 10 may be a range value consisting of any two of the above point values ​​as end values. Preferably, the cross-sectional area of ​​the yarn core 2 accounts for 5% to 10% of the cross-sectional area of ​​the core-spun yarn 10. It can be understood that the cross-sectional area of ​​the core-spun yarn 10 is the sum of the cross-sectional area of ​​the yarn core 2 and the cross-sectional area of ​​the outer covering 1. By controlling the cross-sectional area ratio of the yarn core 2 in the core-spun yarn 10, the size of the hollow structure of the hollow structure yarn formed after the heat setting treatment can be further controlled. Studies have found that when the cross-sectional area of ​​the core yarn 2 is less than this range, the hollow effect is small and the warmth-retention and improvement effect is poor. When the cross-sectional area of ​​the yarn core 2 is too large, it is easy to cause the outer layer of fibers to collapse, affecting the hollowness and warmth retention effects.

[0042] In some embodiments, the core yarn 2 is selected from at least one of polyester thermal-fusible yarn and nylon thermal-fusible yarn.

[0043] In some embodiments, the yarn material of the outer covering layer of the core-spun yarn 10 is selected from a blended yarn formed by a heat-retaining fiber and a hygroscopic fiber. The use of heat-retaining fiber in the outer covering layer 1 of the core-spun yarn 10 can further improve the warmth retention of the denim fabric; further adding hygroscopic fiber can further improve the antistatic effect of the denim fabric.

[0044] In some embodiments, the blended yarn comprises 65% to 80% of the thermal insulation fiber and 20% to 35% of the moisture absorbent fiber, by weight percentage.

[0045] In some embodiments, the thermal insulation fiber is selected from at least one of volcanic rock fiber, wool fiber, and acrylic fiber.

[0046] In some embodiments, the absorbent fiber is selected from at least one of viscose fiber, cotton fiber and lyocell fiber.

[0047] In some embodiments, the weft yarn is a core-spun yarn.

[0048] In some embodiments, the warp yarn is pure cotton yarn, cotton blended yarn or elastic core-spun yarn formed by cotton fiber covering an elastic core.

[0049] In some embodiments, the yarn count of the warp yarn is 8S to 16S. As an example, the yarn count of the warp yarn can be 8S, 9S, 10S, 11S, 12S, 13S, 14S, 15S or 16S. Further, the yarn count of the warp yarn can be a range value consisting of any two of the above point values ​​as end values.

[0050] In some embodiments, the yarn count of the weft yarn is 8S to 16S. As an example, the yarn count of the weft yarn can be 8S, 9S, 10S, 11S, 12S, 13S, 14S, 15S or 16S. Further, the yarn count of the weft yarn can be a range value consisting of any two of the above point values ​​as end values.

[0051] In some embodiments, the weave structure of the thermal denim fabric is twill weave, plain weave, or satin weave.

[0052] In some embodiments, the weave structure of the warm denim fabric is a three-up-one-down twill weave. It can be understood that "three-up-one-down" means that in a complete interlaced cycle unit, and from the front of the fabric, the warp yarn is above the weft yarn three times, and the warp yarn is below the weft yarn once. The three-up-one-down twill weave structure allows the warp yarn to be displayed on the front of the denim fabric, and the weft yarn to be displayed on the back of the denim fabric, that is, the skin-friendly side; this can give full play to the warming effect of the weft yarn.

[0053] In some embodiments, the warp density of the warm denim fabric is 60-90.

[0054] In some embodiments, the weft density of the warm denim fabric is 45-70.

[0055] In some embodiments, before the denim fabric pre-finished product is subjected to heat setting treatment, the following steps are further included:

[0056] The steps of raising, shrinking and bottom shearing are sequentially performed on the denim fabric pre-finished product.

[0057] Raising agents are mainly used to create fluff on the surface of fabrics, increasing the softness, warmth retention and fullness of fabrics. Raising agents can reduce the friction coefficient between fibers, making it easier for fibers to be pulled out from the surface of fabrics to form fluff during the mechanical raising process, thereby further improving the softness and comfort of fabrics, and greatly improving their warmth retention properties.

[0058] In some embodiments, the raising agent is added by dipping or spraying.

[0059] In some embodiments, the amount of the raising agent added is 1% to 5% by weight of the denim fabric pre-finished product.

[0060] Since the fabric is subjected to mechanical effects such as stretching during the weaving and printing and dyeing process, the fibers have internal stress, and the fibers will shrink during the washing process. Through the shrinking step, the fabric is pre-shrunk so that the fabric will not show obvious dimensional changes during subsequent use.

[0061] In some embodiments, the shrinking process uses hot water shrinking or mechanical pre-shrinking.

[0062] In some embodiments, when hot water is used for shrinkage, the water temperature is 80°C to 100°C and the time is 10 min to 30 min.

[0063] The bottom grabbing and shearing can make the length of the fluff at the bottom of the fabric uniform and neat. The bottom grabbing and shearing in this embodiment adopts the conventional method in the art, which will not be described here.

[0064] In some embodiments, after the denim fabric pre-product is heat-set, the method further includes performing shrinkage-proofing on the heat-set denim fabric.

[0065] In another embodiment of the present application, a warm denim fabric is provided. The denim fabric is prepared by the above method.

[0066] In another embodiment of the present application, a warm denim fabric is provided. The warm denim fabric includes warp yarns and weft yarns woven with each other, at least one of the warp yarns and the weft yarns contains core-spun yarn, the core-spun yarn includes a yarn core and an outer layer coated on the outer surface of the yarn core, the yarn core is a hollow structure, and the wall material of the yarn core is melted hot melt wire.

[0067] In some embodiments, the hot-melt resin is at least one of polyester resin and nylon resin.

[0068] In yet another embodiment of the present application, a garment is provided, wherein the garment comprises the above-mentioned warm denim fabric.

[0069] In some embodiments, the above-mentioned clothing can be clothes, pants, skirts, hats, scarves, socks, gloves and shoes.

[0070] In order to make the purpose, technical solutions and advantages of the present invention more concise and clear, the present invention is described with the following specific embodiments, but the present invention is by no means limited to these embodiments. The embodiments described below are only preferred embodiments of the present invention, which can be used to describe the present invention and cannot be understood as limiting the scope of the present invention. It should be pointed out that any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0071] In order to better illustrate the present invention, the present invention is further described below in conjunction with the embodiments. The following are specific embodiments.

[0072] The thermally fusible yarn used in the core-spun yarn in each embodiment and comparative example of the present application is a low-melting-point nylon thermally fusible yarn having a melting point of 80°C.

[0073] Example 1

[0074] See also Figure 2 In this embodiment, a warm denim fabric 100 with a three-up-one-down twill structure is prepared.

[0075] 1. Selection of warp yarn 11: Warp yarn 11 adopts air-spun cotton yarn with a yarn count of 12S.

[0076] 2. The weft yarn 12 is a core-spun yarn formed by a blended yarn of 80wt% volcanic rock fiber and 20wt% viscose fiber covered with a hot-melt yarn, wherein the yarn count of the core-spun yarn is 16S, and the cross-sectional area of ​​the yarn core hot-melt yarn accounts for 10% of the cross-sectional area of ​​the core-spun yarn.

[0077] 3. Organization structure design: three-up and one-down twill, with a warp and weft density of 96×52.

[0078] 4. Fabric weaving process: winding, warping, sizing, drawing-in, weaving, adding raising agent, shrinking, bottom grabbing and shearing, heat setting and shrinkage prevention; the heat setting temperature is 100℃ and the speed is 20m / min.

[0079] Example 2

[0080] The preparation method of this embodiment is basically the same as that of embodiment 1, except that the material of the weft yarn is different. Specifically, the preparation method is as follows:

[0081] 1. Warp yarn selection: The warp yarn adopts air-spun cotton yarn with a yarn count of 12S.

[0082] 2. The weft yarn is a core-spun yarn formed by a blended yarn of 70wt% volcanic rock fiber and 30wt% viscose fiber covered with a hot-melt yarn, wherein the yarn count of the core-spun yarn is 16S, and the cross-sectional area of ​​the yarn core hot-melt yarn accounts for 5% of the cross-sectional area of ​​the core-spun yarn.

[0083] 3. Organization structure design: three-up and one-down twill, with a warp and weft density of 96×52.

[0084] 4. Fabric weaving process: winding, warping, sizing, drawing-in, weaving, singeing, desizing, adding raising agent, shrinking, bottom grabbing and shearing, heat setting and shrinkage prevention; among them, the heat setting temperature is 100℃ and the speed is 20m / min.

[0085] Example 3

[0086] The preparation method of this embodiment is basically the same as that of embodiment 1, except that the material of the weft yarn is different. Specifically, the preparation method is as follows:

[0087] 1. Warp yarn selection: The warp yarn adopts air-spun cotton yarn with a yarn count of 12S.

[0088] 2. The weft yarn is a core-spun yarn formed by a blended yarn formed by 80wt% volcanic rock fiber and 20wt% viscose fiber covered with a hot-melt yarn, wherein the yarn count of the core-spun yarn is 16S, and the cross-sectional area of ​​the yarn core hot-melt yarn accounts for 15% of the cross-sectional area of ​​the core-spun yarn.

[0089] 3. Organization structure design: three-up and one-down twill, with a warp and weft density of 96×52.

[0090] 4. Fabric weaving process: winding, warping, sizing, drawing-in, weaving, singeing, desizing, adding raising agent, shrinking, bottom grabbing and shearing, heat setting and shrinkage prevention; among them, the heat setting temperature is 100℃ and the speed is 20m / min.

[0091] Example 4

[0092] The preparation method of this embodiment is basically the same as that of embodiment 1, except that the material of the weft yarn is different. Specifically, the preparation method is as follows:

[0093] 1. Warp yarn selection: The warp yarn adopts air-spun cotton yarn with a yarn count of 12S.

[0094] 2. The weft yarn is a core-spun yarn formed by a blended yarn of 65wt% volcanic rock fiber and 35wt% viscose fiber covered with a hot-melt yarn, wherein the yarn count of the core-spun yarn is 16S, and the cross-sectional area of ​​the yarn core hot-melt yarn accounts for 10% of the cross-sectional area of ​​the core-spun yarn.

[0095] 3. Organization structure design: three-up and one-down twill, with a warp and weft density of 96×52.

[0096] 4. Fabric weaving process: winding, warping, sizing, drawing-in, weaving, singeing, desizing, adding raising agent, shrinking, bottom grabbing and shearing, heat setting and shrinkage prevention; among them, the heat setting temperature is 100℃ and the speed is 20m / min.

[0097] Example 5

[0098] The preparation method of this embodiment is basically the same as that of embodiment 1, except that the material of the weft yarn is different. Specifically, the preparation method is as follows:

[0099] 1. Warp yarn selection: The warp yarn adopts air-spun cotton yarn with a yarn count of 12S.

[0100] 2. The weft yarn is a core-spun yarn of 100wt% volcanic rock fiber yarn covered with a hot-melt yarn, wherein the yarn count of the core-spun yarn is 16S, and the cross-sectional area of ​​the yarn core hot-melt yarn accounts for 10% of the cross-sectional area of ​​the core-spun yarn.

[0101] 3. Organization structure design: three-up and one-down twill, with a warp and weft density of 96×52.

[0102] 4. Fabric weaving process: winding, warping, sizing, drawing-in, weaving, singeing, desizing, adding raising agent, shrinking, bottom grabbing and shearing, heat setting and shrinkage prevention; among them, the heat setting temperature is 100℃ and the speed is 20m / min.

[0103] Example 6

[0104] The preparation method of this embodiment is basically the same as that of embodiment 1, except that the speed in the heat setting treatment step is different. Specifically, the preparation method is as follows:

[0105] 1. Warp yarn selection: The warp yarn adopts air-spun cotton yarn with a yarn count of 12S.

[0106] 2. The weft yarn is a core-spun yarn formed by a blended yarn formed by 80wt% volcanic rock fiber and 20wt% viscose fiber covered with a hot-melt yarn, wherein the yarn count of the core-spun yarn is 16S, and the cross-sectional area of ​​the yarn core hot-melt yarn accounts for 10% of the cross-sectional area of ​​the core-spun yarn.

[0107] 3. Organization structure design: three-up and one-down twill, with a warp and weft density of 96×52.

[0108] 4. Fabric weaving process: winding, warping, sizing, drawing-in, weaving, singeing, desizing, adding raising agent, shrinking, bottom grabbing and shearing, heat setting and shrinkage prevention; among them, the heat setting temperature is 80℃ and the speed is 30m / min.

[0109] Comparative Example 1

[0110] The preparation method of this comparative example 1 is basically the same as that of Example 1, except that the weft yarn material is different. Specifically, the preparation method of this comparative example is as follows:

[0111] 1. Selection of warp and weft yarns: The warp yarn is air-spun cotton yarn with a yarn count of 12S.

[0112] 2. The weft yarn is a blended yarn consisting of 65wt% volcanic rock fiber and 35wt% viscose fiber, with a yarn count of 16S.

[0113] 3. Organization structure design: three-up and one-down twill, with a warp and weft density of 96×52.

[0114] 4. Fabric weaving process: winding, warping, sizing, drawing-in, weaving, singeing, desizing, adding raising agent, shrinking, bottom grabbing and shearing, heat setting and shrinkage prevention; among them, the heat setting temperature is 100℃ and the speed is 20m / min.

[0115] Performance Test:

[0116] Thermal insulation rate: According to the method specified in GB / T35263-2017, the thermal insulation rate of the warm denim fabrics prepared in each embodiment and comparative example was tested.

[0117] Antistatic effect: According to GB / T35263-2017, the antistatic effect of the warm denim fabrics prepared in each embodiment and comparative example was tested.

[0118] The performance test data of the warm denim fabrics prepared in various embodiments and comparative examples are shown in Table 1 below.

[0119] Table 1

[0120]

[0121] As can be seen from Table 1, when preparing denim fabric in Comparative Example 1, a blended yarn formed by 65wt% volcanic rock fiber and 35wt% viscose fiber is directly used as the weft yarn, and the heat preservation rate of the denim fabric prepared is only 25%. However, the heat preservation rate of the denim fabric prepared in Examples 1 to 7 reaches 25% to 28%. It can be seen that the heat preservation effect of the denim fabric prepared by the yarn without the core-spun yarn structure in Comparative Example 1 is not as good as the denim fabric prepared by Examples 1 to 7 when the core-spun yarn with the hot melt yarn as the yarn core is used as the weft yarn.

[0122] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0123] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims, and the description can be used to interpret the content of the claims.

Claims

1. A method for preparing a warm denim fabric, characterized in that: The steps include: Weaving warp yarns and weft yarns to obtain a denim fabric pre-finished product; at least one of the warp yarns and the weft yarns contains a core-spun yarn, the core-spun yarn includes a yarn core and an outer covering layer covering the outer surface of the yarn core, and the yarn core is a hot-melt fiber; The denim fabric pre-finished product is subjected to a heat setting treatment; the temperature of the heat setting treatment is higher than or equal to the melting point of the hot-melt fiber and lower than the melting point of the yarn of the outer covering layer.

2. The preparation method according to claim 1, characterized in that The melting point of the hot melt fiber is 80°C to 100°C.

3. The preparation method according to claim 1, characterized in that: The temperature of the heat setting treatment is 90°C to 100°C.

4. The preparation method according to any one of claims 1 to 3, characterized in that The speed of the heat setting treatment is 20m / min~30m / min.

5. The preparation method according to any one of claims 1 to 3, characterized in that: The core-spun yarn meets at least one of the following conditions: (1) The cross-sectional area of ​​the yarn core accounts for 5% to 15% of the cross-sectional area of ​​the core-spun yarn; (2) The yarn core is selected from at least one of polyester fiber and nylon fiber; (3) The yarn of the outer covering layer comprises a blended yarn formed by 65wt%~80wt% of thermal insulation fiber and 20wt%~35wt% of hygroscopic fiber; the thermal insulation fiber is selected from at least one of volcanic rock fiber, wool fiber and acrylic fiber; the hygroscopic fiber is selected from at least one of viscose fiber, cotton fiber and lyocell fiber.

6. The preparation method according to any one of claims 1 to 3, characterized in that: The weft yarn is the core-spun yarn; and / or the warp yarn is pure cotton yarn, cotton blended yarn or elastic core-spun yarn formed by cotton fiber covering an elastic yarn core.

7. The preparation method according to any one of claims 1 to 3, characterized in that: The preparation method satisfies at least one of the following conditions: (1) The yarn count of the warp yarn is 8S~16S; (2) The yarn count of the weft yarn is 8S to 16S; (3) The weave structure of the thermal denim fabric is twill weave, plain weave or satin weave.

8. The preparation method according to claim 7, characterized in that: The weave structure of the thermal denim fabric is a three-up-one-down twill weave.

9. A warm denim fabric, characterized in that: Prepared by the method according to any one of claims 1 to 8; or The warm denim fabric includes warp yarns and weft yarns woven together, at least one of the warp yarns and the weft yarns contains core-spun yarns, the core-spun yarns include a yarn core and an outer covering layer covering the outer surface of the yarn core, the yarn core is a hollow structure, and the wall material of the yarn core is melted hot melt wire.

10. A garment, characterized in that: The garment comprises the warm denim fabric according to claim 9.

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