Graphene constant-temperature down jacket and preparation method thereof

Abstract

The invention relates to a graphene constant-temperature down jacket and a preparation method thereof. The graphene constant-temperature down jacket structurally comprises a down jacket fabric, and the down jacket fabric structurally comprises an outer-layer waterproof fabric, an inner-layer graphene fabric and a down filling bag arranged between the outer-layer waterproof fabric and the inner-layer graphene fabric; wherein the down filling bag structurally comprises two layers of one-way moisture conducting fabrics and a composite sewing thread structure for separating the two layers of one-way moisture conducting fabrics to form down filling cavities; the composite sewing thread structure comprises a polyurethane adhesive tape arranged between the two layers of one-way moisture conduction fabric and a heat storage sewing thread used for sewing the two layers of one-way moisture conduction fabric and the polyurethane adhesive tape. According to the fabric structure provided by the invention, microcirculation of heat energy in the down jacket fabric is realized, and the temperature rise and heat retention property of the fabric is further improved.

Description

Technical Field

[0001] The invention belongs to the technical field of down jackets, and in particular relates to a graphene constant temperature down jacket and a preparation method thereof. Background Art

[0002] Keeping warm is an important indicator to measure the comfort of winter clothing. Clothing warmth-keeping methods are generally divided into passive warmth-keeping and active warmth-keeping. Passive warmth-keeping clothing relies on a static air layer to achieve warmth-keeping effects. It is bulky and inconvenient to move, and cannot meet the modern people's requirements for clothing aesthetics and comfort. Therefore, active warmth-keeping materials that can generate heat autonomously to keep warm have received more attention. The method of autonomously generating heat to keep warm is mainly achieved by means of moisture absorption and heat generation mechanisms and phase change microcapsules.

[0003] No matter in motion or at rest, human skin is constantly expelling sweat in gaseous or liquid form, which forms a microclimate zone between the surface of human skin and clothing. Maintaining the stability of the microclimate zone is the key to improving the wearing comfort of fabrics. At present, thermal insulation fabrics often fail to achieve good heat-generating and heat-retaining performance due to design defects in the fabric structure. Therefore, the present invention further designs and improves the structural composition of clothing fabrics, optimizes the heat and moisture transfer state between the human body and the clothing fabric, so as to form a relatively stable and comfortable microclimate zone between the human body and the fabric, which has positive significance for improving the thermal insulation performance of thermal insulation fabrics. Summary of the invention

[0004] The purpose of the present invention is to provide a graphene constant temperature down jacket and a preparation method thereof in order to solve the above-mentioned problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] The first aspect of the present invention provides a graphene constant temperature down jacket, which comprises a down jacket fabric, wherein the structure of the down jacket fabric comprises an outer waterproof fabric, an inner graphene fabric, and a down filling bag arranged between the outer waterproof fabric and the inner graphene fabric;

[0007] Among them, the structure of the down filling bag includes two layers of unidirectional moisture-conducting fabrics and a composite stitching that separates the two layers of unidirectional moisture-conducting fabrics to form a down filling cavity. The structure of the composite stitching includes a polyurethane strip arranged between the two layers of unidirectional moisture-conducting fabrics and a heat-storage stitching used to sew the two layers of unidirectional moisture-conducting fabrics and the polyurethane strip.

[0008] As a further optimization scheme of the present invention, the heat storage suture is obtained by melt spinning of the following raw materials in percentage by mass: 80-85% nylon 66 chips, 2-10% lithium salt, 1-5% solvent oil, 1-5% dispersant and 1-5% antioxidant.

[0009] As a further optimization scheme of the present invention, the inner graphene fabric and the outer waterproof fabric are both provided with a cloth strip for fixing the unidirectional moisture-conducting fabric on the side facing the down filling bag.

[0010] As a further optimization scheme of the present invention, the inner layer graphene fabric comprises 60-70% cotton yarn and 30-40% graphene nylon blended yarn in terms of mass percentage, and the blending mass ratio of graphene fiber to nylon 66 fiber in the graphene nylon 66 blended yarn is 1:10-20.

[0011] As a further optimization scheme of the present invention, the inner layer of graphene fabric is subjected to immersion treatment with a phase change microcapsule treatment liquid having a phase change temperature of 25-30°C at the position corresponding to the heat storage stitching on the down filling bag. The specific treatment method is as follows: first, the phase change microcapsule solution, the adhesive and water are uniformly mixed to prepare a phase change microcapsule treatment liquid, the inner layer of graphene fabric is placed in the phase change microcapsule treatment liquid according to a bath ratio of 1:10-20, and after being immersed at 20-60°C for 30 minutes, it is dried at 90-120°C, washed with water and dried.

[0012] As a further optimization scheme of the present invention, the phase change microcapsule treatment liquid comprises, by mass percentage, 10-30% phase change microcapsule solution, 1-10% binder, and the remainder is water.

[0013] As a further optimization scheme of the present invention, the one-way moisture-conducting fabric is a polyester-cotton weft-knitted double-layer knitted fabric, and the polyester side of the polyester-cotton weft-knitted double-layer knitted fabric is finished with a water-repellent agent.

[0014] The second aspect of the present invention also provides a method for preparing a graphene antibacterial down jacket as described above, which specifically comprises the following steps:

[0015] (1) preparing a heat storage suture, firstly blending nylon 66 slices, lithium salt, solvent oil, dispersant and antioxidant, sending the obtained blend to a melt spinning machine for spinning to obtain spun yarn, and then drawing and cooling the spun yarn to obtain a heat storage suture for standby use;

[0016] (2) taking two layers of one-way moisture-conducting fabrics with their hydrophilic surfaces facing outward, and sewing the two layers of one-way moisture-conducting fabrics by using a sewing structure according to the required size of the down filling cavity to obtain a down filling bag;

[0017] (3) preparing an outer waterproof fabric and an inner graphene fabric, and compounding the outer waterproof fabric and the inner graphene fabric on both sides of a down filling bag, filling the down filling bag with down, and sealing the down filling bag with a suture structure to obtain a down jacket fabric;

[0018] (4) The graphene constant temperature down jacket is prepared by using the down jacket fabric obtained in step (3).

[0019] The beneficial effects of the present invention are:

[0020] 1. The graphene antibacterial down jacket structure provided by the present invention includes a down jacket fabric. The structure of the down jacket fabric includes an outer waterproof fabric, an inner graphene fabric, and a down filling bag arranged between the outer waterproof fabric and the inner graphene fabric. The hot and humid air generated by the heating of the inner graphene fabric is transferred to the down filling bag through two layers of unidirectional moisture-conducting fabrics to heat the down. The hot and humid air circulates in the down filling bag and accumulates heat in cooperation with the heat-storage stitches. The heat energy realizes microcirculation in the down jacket fabric, thereby further improving the heating and warmth retention of the fabric.

[0021] 2. The present invention performs phase change microcapsule finishing on the inner graphene fabric, so that the inner graphene fabric can maintain a stable temperature of the fabric, thereby further improving the thermal insulation of the fabric.

[0022] 3. The composite stitching provided in the present invention separates the down filling cavity from the down filling bag, and the structure of the composite stitching includes a polyurethane tape provided between two layers of one-way moisture-conducting fabrics and a heat-storage stitching used to sew the two layers of one-way moisture-conducting fabrics and the polyurethane tape. The heat-storage stitching can, on the one hand, store heat to help improve the thermal insulation and heating performance of the fabric, and on the other hand, can cooperate with the polyurethane tape to ensure that the down filling bag is not easy to be drilled with down, thereby improving the down-proof property of the down jacket fabric. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A cross-sectional view of the down jacket fabric provided by the present invention;

[0024] Figure 2 A schematic diagram of the three-dimensional structure of the down jacket fabric provided by the present invention (the inner layer of graphene fabric is not shown in the figure);

[0025] Figure 3 A schematic diagram of the three-dimensional structure of the inner graphene fabric provided by the present invention;

[0026] In the figure, 1 is the outer waterproof fabric; 2, the inner graphene fabric; 3, the one-way moisture-conducting fabric; 4, the polyurethane tape; 5, the heat-storage stitching; 6, the cloth strip; 7, the phase change functional layer. DETAILED DESCRIPTION

[0027] The present application is described in further detail below. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0028] Example 1 Preparation of down jacket fabric

[0029] like Figure 1-3 As shown, the structure of the down jacket fabric includes an outer waterproof fabric 1, an inner graphene fabric 2, and a down filling bag arranged between the outer waterproof fabric 1 and the inner graphene fabric 2; wherein, the structure of the down filling bag includes two layers of unidirectional moisture-conducting fabrics 3 and a composite stitching structure for separating the two layers of unidirectional moisture-conducting fabrics 3 to form a down filling cavity, the composite stitching structure includes a polyurethane tape 4 arranged between the two layers of unidirectional moisture-conducting fabrics 3 and a heat-storage stitching 5 for stitching the two layers of unidirectional moisture-conducting fabrics and the polyurethane tape, and a cloth strip 6 for fixing the unidirectional moisture-conducting fabric is provided on the side of the inner graphene fabric 2 and the outer waterproof fabric 1 facing the down filling bag.

[0030] When preparing the down jacket fabric, first, two layers of unidirectional moisture-conducting fabrics are taken so that the hydrophilic surfaces of both layers are arranged on the outside, and the two layers of unidirectional moisture-conducting fabrics are passed through the cloth strips 6 arranged on the inner graphene fabric 2 and the outer waterproof fabric 1 respectively;

[0031] Then, according to the required size of the down filling cavity, a down filling bag is obtained by sewing between two layers of one-way moisture-conducting fabrics using a sewing structure. Specifically, a polyurethane strip is placed between the two layers of one-way moisture-conducting fabrics. The placement of the polyurethane strip should also pay attention to accommodating the strip into the final down filling cavity. Finally, the two layers of one-way moisture-conducting fabrics and the polyurethane strip 4 are sewn together using a heat-storage stitch 5.

[0032] In this embodiment, the connection between the two layers of unidirectional moisture-conducting fabrics and the inner layer of graphene fabric 2 and the outer layer of waterproof fabric 1 can also be achieved by bonding with an adhesive.

[0033] Furthermore, in this embodiment:

[0034] The outer waterproof fabric 1 is obtained by finishing nylon fabric with a water repellent (commercially available, silicone water repellent). The method of finishing with the water repellent is as follows: immersing the nylon fabric in the water repellent for 30 minutes, with a bath ratio of 1:20 and a rolling rate of 75%, pre-baking at 65°C for 15 minutes, and then baking at 120°C for 4 minutes.

[0035] The inner layer graphene fabric 2 is obtained by weaving 70% cotton yarn as warp yarn and 30% graphene nylon blended yarn as weft yarn, and the blending mass ratio of graphene fiber to nylon 66 fiber in the graphene nylon 66 blended yarn is 1:10.

[0036] The inner graphene fabric 2 at the position corresponding to the heat storage stitching 5 on the down filling bag also has a phase change functional layer 7 formed by immersion treatment with a phase change microcapsule treatment liquid with a phase change temperature of 25°C. The specific treatment method is: first, according to the mass percentage, 20% phase change microcapsule solution, 5% adhesive (commercially available, acrylate) and water are uniformly mixed to prepare a phase change microcapsule treatment liquid, and the inner graphene fabric 2 is placed in the phase change microcapsule treatment liquid at a bath ratio of 1:20. After immersion treatment at 30°C for 30 minutes, the rolling rate is 75%, and it is dried at 100°C and then washed and dried.

[0037] The one-way moisture-conducting fabric 3 is a polyester-cotton weft-knitted double-layer knitted fabric, and the polyester side of the polyester-cotton weft-knitted double-layer knitted fabric is finished with a water-repellent agent. The specific method of the water-repellent agent finishing is the same as the waterproof finishing of the outer waterproof fabric 1.

[0038] In this embodiment, the heat storage suture is obtained by melt spinning the following raw materials in mass percentage: 85% nylon 66 chips, 5% lithium salt (lithium chloride), 5% solvent oil (white oil), 3% dispersant NNO and 1682% antioxidant. The preparation method is specifically: directly put the above raw materials into a screw extruder with an aspect ratio of 20:1 for melt extrusion to obtain nascent filaments, and the nascent filaments are subjected to drafting and cooling to obtain the heat storage suture. Among them, the process parameters of the screw extruder are specifically that the temperatures of each section of the screw are 190°C for the feeding section, 240°C for the compression section and 260°C for the metering section, the screw speed is 200r / min, the length of the flow channel at the end of the screw extruder is 5cm, the aspect ratio of the spinneret is 10:1, and the obtained nascent filaments are subjected to primary drafting at 105°C, the drafting multiple is 5 times, and the secondary drafting is carried out at 120°C, and the drafting multiple is 3 times to complete the drafting.

[0039] Example 2 Fabric thermal insulation and heating performance test

[0040] In order to explore the influence of the structural design of down jacket fabrics on the wearing performance of the down jackets prepared therefrom, the following test examples were set up:

[0041] Test Example 1

[0042] In order to explore the structural composition of the down filling bag, this test example uses pure cotton fabric and polyester fabric instead of the two layers of unilateral moisture-conducting fabric in Example 1. The pure cotton fabric is arranged close to the outer waterproof fabric, and the polyester fabric is arranged close to the inner graphene fabric. The pure cotton fabric and the polyester fabric are not subjected to the step of water-repellent finishing with a water-repellent agent on the polyester side of the polyester-cotton weft-knitted double-layer knitted fabric disclosed in Example 1. The preparation method of the down jacket fabric and the selection and treatment process of each fabric are the same as those described in Example 1.

[0043] Test Example 2

[0044] In this test example, the preparation of the down jacket fabric is different from that of Example 1 in that the hydrophilic surfaces of the two layers of unidirectional moisture-conducting fabrics are both arranged toward the inside, and the remaining preparation steps of the down jacket fabric and the selection and treatment process of each fabric are the same as those described in Example 1.

[0045] Test Example 3

[0046] In this test example, nylon suture thread is used instead of the heat storage suture thread disclosed in Example 1. The preparation method of down jacket fabric and the selection and processing process of each fabric are the same as those described in Example 1.

[0047] Test Example 4

[0048] This test example uses two layers of polyester fabric instead of the two layers of unidirectional moisture-conducting fabric in Example 1, and the polyester fabric is not subjected to the step of water-repellent finishing of the polyester side of the polyester-cotton weft-knitted double-layer knitted fabric disclosed in Example 1. The preparation method of the down jacket fabric and the selection and treatment process of each fabric are the same as those described in Example 1.

[0049] Test Example 5

[0050] In order to explore the influence of the structure of the inner graphene fabric on the down jacket fabric, in this test example, the inner graphene fabric 2 does not have a phase change functional layer 7 formed by immersion treatment with a phase change microcapsule treatment liquid with a phase change temperature of 25°C at the position corresponding to the heat storage stitch 5 on the down filling bag.

[0051] First, the thermal insulation performance of the down jacket fabrics prepared in Example 1 and Test Examples 1-5 was tested.

[0052] The specific test process is as follows: 30 glass bottles filled with hot water at about 90°C are taken, wrapped with the down jacket fabrics prepared in Example 1 and Test Examples 1-5, and placed in a room temperature environment. Five repetitions are set for each group. The temperature change of the thermometer is observed and the water temperature in the glass bottle is recorded after 5 hours. The temperature loss rate is calculated, and the average value of each data is taken. The results are shown in Table 1.

[0053] In addition, the standard GB / T11048-2008 "Determination of thermal resistance and moisture resistance of textiles under steady-state conditions of physiological comfort" was further referred to. The test was carried out using the YG606E textile thermal resistance tester. Five samples were taken for each fabric sample, and the average value was finally taken.

[0054] Table 1 Results Statistics

[0055]

[0056]

[0057] It can be seen from the table that the thermal insulation performance of the down jacket fabric prepared in Example 1 is better than that of Test Examples 1 to 5. It can be seen that the adjustment of the structural composition of the down filling bag has a certain degree of influence on the thermal insulation performance of the down jacket fabric.

[0058] From the comparison of the data of Test Example 3 and Example 1, it can be seen that the heat storage stitching used in Example 1 can improve the thermal insulation performance of the fabric as a whole. The results of Example 1 comparing Test Examples 1-2 and 4 show that selecting two layers of unidirectional moisture-conducting fabric as the main structure of the down filling bag has a positive effect on improving the thermal insulation performance of the fabric as a whole.

[0059] In addition, the results of Experimental Example 5 and Example 1 also illustrate that the phase change microcapsule treatment of the inner graphene fabric has a positive effect on the thermal insulation performance of the fabric.

[0060] Subsequently, the down jacket fabrics prepared in Example 1 and Test Examples 1-5 were tested for their hygroscopic and heat-generating properties. The test for hygroscopic and heat-generating properties was conducted in accordance with GB / T29866-2013 "Test Method for Hygroscopic and Heat-Generating Properties of Textiles". The down jacket fabrics prepared in Example 1 and Test Examples 1-5 were placed in a blast drying oven. After drying, they were moved into a drying dish for cooling. The drying dish was then placed in a constant temperature and humidity chamber for balance. A temperature sensor was inserted into the sample bag. Temperature data was recorded every 30 seconds, and the measurement time was 30 minutes. After the test, the average temperature rise value and the maximum temperature rise value of each group were calculated. The results are shown in Table 2.

[0061] Table 2 Results Statistics

[0062]

[0063] It can be seen from Table 2 that Example 1 has excellent moisture absorption and heat generation performance compared with Test Examples 1 to 5. The down jacket fabric prepared in Example 1 has excellent heat generation and moisture conduction performance, and heat energy is microcirculated in the down fabric to improve the temperature and warmth retention of the fabric.

[0064] Specifically, the graphene nylon blended yarn used in the inner graphene fabric 2 has excellent heating properties. The fabric generates heat, and the hot and humid air passes through the inner graphene fabric 2 and is transferred to the down filling bag through the double-layer unidirectional moisture-conducting fabric to heat the down. The hot air circulates in the down filling bag and accumulates heat while cooperating with the heat-storing stitches, thereby enabling the down jacket fabric of Example 1 to obtain excellent moisture absorption and heating properties.

[0065] The above description shows and describes several preferred embodiments of the invention, but as mentioned above, it should be understood that the invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. Changes and modifications made by those skilled in the art should be within the scope of protection of the claims attached to the invention without departing from the spirit and scope of the invention.

Claims

1. A graphene constant temperature down jacket, characterized in that: The structure includes a down jacket fabric, wherein the structure of the down jacket fabric includes an outer waterproof fabric, an inner graphene fabric, and a down filling bag arranged between the outer waterproof fabric and the inner graphene fabric; Among them, the structure of the down filling bag includes two layers of unidirectional moisture-conducting fabrics and a composite stitching that separates the two layers of unidirectional moisture-conducting fabrics to form a down filling cavity. The structure of the composite stitching includes a polyurethane strip arranged between the two layers of unidirectional moisture-conducting fabrics and a heat-storage stitching used to sew the two layers of unidirectional moisture-conducting fabrics and the polyurethane strip.

2. The graphene constant temperature down jacket according to claim 1, characterized in that: The heat storage suture is obtained by melt spinning the following raw materials in mass percentage: 80-85% of nylon 66 chips, 2-10% of lithium salt, 1-5% of solvent oil, 1-5% of dispersant and 1-5% of antioxidant.

3. The graphene constant temperature down jacket according to claim 1, characterized in that: The inner graphene fabric and the outer waterproof fabric are both provided with a cloth strip for fixing the unidirectional moisture-conducting fabric on one side facing the down filling bag.

4. The graphene constant temperature down jacket according to claim 1, characterized in that: The inner layer graphene fabric comprises 60-70% cotton yarn and 30-40% graphene nylon blended yarn in terms of mass percentage, and the blending mass ratio of graphene fiber to nylon 66 fiber in the graphene nylon 66 blended yarn is 1:10-20.

5. The graphene constant temperature down jacket according to claim 1, characterized in that: The inner graphene fabric has a phase change functional layer formed by immersion and rolling treatment with a phase change microcapsule treatment liquid with a phase change temperature of 25-30°C at the position corresponding to the heat storage stitching on the down filling bag. The specific treatment method is: first, the phase change microcapsule solution, the adhesive and water are evenly mixed to prepare the phase change microcapsule treatment liquid, and the inner graphene fabric is placed in the phase change microcapsule treatment liquid according to a bath ratio of 1:10-20. After immersion at 20-60°C for 30 minutes, the rolling rate is 75-80%, and it is dried at 90-120°C and then washed and dried.

6. The graphene constant temperature down jacket according to claim 5, characterized in that: The phase change microcapsule treatment liquid comprises, by mass percentage, 10-30% of phase change microcapsule solution, 1-10% of adhesive, and the remainder is water.

7. The graphene constant temperature down jacket according to claim 1, characterized in that: The one-way moisture-conducting fabric is a polyester-cotton weft-knitted double-layer knitted fabric, and the polyester side of the polyester-cotton weft-knitted double-layer knitted fabric is finished with a water-repellent agent.

8. A method for preparing a graphene constant temperature down jacket as claimed in any one of claims 1 to 7, characterized in that: The specific steps include: (1) preparing a heat storage suture, firstly blending nylon 66 slices, lithium salt, solvent oil, dispersant and antioxidant, sending the obtained blend to a melt spinning machine for spinning to obtain spun yarn, and then drawing and cooling the spun yarn to obtain a heat storage suture for standby use; (2) taking two layers of one-way moisture-conducting fabrics with their hydrophilic surfaces facing outward, and sewing the two layers of one-way moisture-conducting fabrics by using a sewing structure according to the required size of the down filling cavity to obtain a down filling bag; (3) preparing an outer waterproof fabric and an inner graphene fabric, and compounding the outer waterproof fabric and the inner graphene fabric on both sides of a down filling bag, filling the down filling bag with down, and sealing the down filling bag with a suture structure to obtain a down jacket fabric; (4) The graphene constant temperature down jacket is prepared by using the down jacket fabric obtained in step (3).

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