A wool blended outdoor fabric and a method of making the same

Abstract

The present application relates to a kind of wool blended outdoor fabric and its preparation method, it relates to clothing fabric technical field, the fabric structure includes face cloth, bottom cloth and the graphene functional film being compounded between bottom cloth and face cloth;Wherein, the face cloth is polyester-wool blended knitted fabric, bottom cloth is polypropylene warp-knitted fabric;The graphene functional film is with polyurethane spinning solution as raw material, while being compounded core-spun yarn in centrifugal spinning and is made;The structure of the core-spun yarn includes with water-soluble fiber as core yarn layer and on the surface of core yarn layer intermittent polyurethane fiber is coated to form core layer, the surface of the polyurethane fiber is loaded with graphene nanoparticles, because wool fiber has hollow heat insulation function cooperates the windproof and warm-keeping of graphene functional film, far infrared heating makes fabric have excellent warm-keeping property, in addition, fabric also has stronger waterproof, breathable and moisture permeable and bacteriostatic property, so that it has good application prospect in outdoor clothing field.

Description

Technical Field

[0001] This invention belongs to the field of clothing fabric technology, specifically relating to a wool blended outdoor fabric and its preparation method. Background Technology

[0002] Currently, most functional outdoor leisure clothing products use materials such as PU, TPU, and PTFE to coat or laminate fabrics to improve wind and water repellency. While these fabrics offer good wind and water resistance, they suffer from poor breathability and moisture permeability. This prevents the timely release of sweat, increasing humidity inside the garment, reducing its antibacterial properties, and causing discomfort. Furthermore, moisture accelerates heat conduction, significantly reducing warmth retention. After several washes, the coatings and laminations may separate from the fabric or crack, severely impacting its lifespan. Therefore, this invention proposes a wool blend outdoor fabric and its preparation method. Summary of the Invention

[0003] The purpose of this invention is to provide a wool blended outdoor fabric and its preparation method in order to solve the above-mentioned problems.

[0004] The present invention achieves the above objectives through the following technical solutions:

[0005] As a first aspect of the present invention, the present invention provides a wool blended outdoor fabric, the fabric structure comprising a base fabric, an outer fabric, and a graphene functional film composited between the base fabric and the outer fabric.

[0006] The outer fabric is a polyester-wool blend knitted fabric, and the base fabric is a polypropylene warp-knitted fabric.

[0007] The graphene functional membrane is made by using polyurethane spinning solution as raw material and composite core-spun yarn during centrifugal spinning; the structure of the core-spun yarn includes water-soluble fiber as core yarn layer and polyurethane fiber intermittently coated on the surface of the core yarn layer to form a core-spun layer, and the surface of the polyurethane fiber is loaded with graphene nanoparticles.

[0008] As a further optimization of the present invention, the fabric is made of polyester fiber as warp and polyester fiber combined with wool fiber as weft. The warp yarn weaving density is 20-35 yarns / cm, the weft yarn weaving density is 15-25 yarns / cm, and the weave structure is plain weave.

[0009] As a further optimization of the present invention, the fabric comprises, by weight percentage, 60-80% polyester fiber and 20-40% wool fiber.

[0010] As a further optimization of the present invention, the polyurethane spinning solution is obtained by adding polyurethane to N,N dimethylformamide and mixing them evenly, and the mass concentration of the polyurethane spinning solution is 15-20%.

[0011] As a second aspect of the present invention, the present invention also provides a method for preparing a wool blended outdoor fabric as described in any of the above descriptions, comprising the following steps:

[0012] (1) Immerse polyurethane fibers in a graphene nanoparticle dispersion, then take them out and dry them. Repeat the cycle 2-5 times to obtain polyurethane fibers loaded with graphene nanoparticles. Then, use water-soluble fibers as the core yarn layer and intermittently coat the polyurethane fibers on the surface of the core yarn layer to form a core-spun layer, thus obtaining the core-spun yarn.

[0013] (2) Prepare polyurethane spinning solution, centrifuge the polyurethane spinning solution, collect the fibers and press them to obtain a first base film, place core-spun yarn on the first base film, and then perform water vapor spray treatment to wet the core-spun yarn. Subsequently, place the first base film on the receiving substrate to continue spinning, collect the fibers and press them to obtain the graphene functional film.

[0014] (3) The graphene functional film prepared in step (2) is placed between polyester-wool blended knitted fabric and polypropylene warp-knitted fabric and hot-pressed to obtain the wool blended outdoor fabric.

[0015] As a further optimization of the present invention, step (2) specifically involves placing the core-spun yarns perpendicularly to each other along the warp and weft directions. The intersection of the warp and weft directions is the position where the core-spun yarns are not covered with polyurethane fibers. The placement density of the warp and weft core-spun yarns is 10-15 yarns / cm.

[0016] As a further optimization of the present invention, in step (2), the rotation speed of the centrifugal spinning is 4400-4600 r / min, the collection distance is 28-32 cm, the temperature is 25-28℃, and the relative humidity is 35-40%.

[0017] As a further optimization of the present invention, in step (3), the process parameters for hot pressing are: hot pressing temperature of 150-180℃ and pressure roller pressure of 4-6 kg / cm. 2 The vehicle speed is 7-15 m / min.

[0018] The beneficial effects of this invention are as follows:

[0019] In this application, the graphene functional film is made by combining a polyurethane spinning solution with a core-spun yarn during centrifugal spinning. The core-spun yarn structure includes a water-soluble fiber as the core layer and a core layer formed by intermittently coating polyurethane fibers on the surface of the core layer. Graphene nanoparticles are loaded on the surface of the polyurethane fibers. The fabric obtained by this invention has excellent warmth retention due to the combination of the hollow insulation function of wool fibers and the windproof, warm, and far-infrared heating properties of the graphene functional film. In addition, the fabric has strong waterproof, breathable, moisture-permeable, and antibacterial properties, making it promising for application in the field of outdoor clothing. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the fabric structure provided by the present invention;

[0021] Figure 2 This is a schematic diagram showing the position of the core-spun yarn on the first base film in Embodiment 1 of the present invention;

[0022] Figure 3 This is a schematic diagram showing the position of the core-spun yarn on the first base film in Comparative Example 4 provided by the present invention;

[0023] Figure 4 This is a schematic diagram showing the position of the core-spun yarn on the first base film in Comparative Example 5 provided by the present invention;

[0024] Figure 5 This is a schematic diagram showing the position of the core-spun yarn on the first base film in Comparative Example 6 provided by the present invention.

[0025] In the diagram: 1. Face fabric; 2. Graphene functional film; 3. Base fabric; 4. First base film; 5. Core-spun yarn; 51. Core yarn layer; 52. Core-spun layer; 6. Hollow polyurethane staple fiber. Detailed Implementation

[0026] The present application will now be described in further detail. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0027] Unless otherwise specified, all materials used in the following examples are commercially available.

[0028] Example 1

[0029] This embodiment provides a wool blend outdoor fabric, such as Figure 1 As shown, the fabric structure includes a base fabric, a face fabric, and a graphene functional film composited between the base fabric and the face fabric.

[0030] The outer fabric is a polyester-wool blend knitted fabric, and the base fabric is a polypropylene warp-knitted fabric.

[0031] The graphene functional membrane is made by using polyurethane spinning solution as raw material and composite core-spun yarn during centrifugal spinning; the structure of the core-spun yarn is that water-soluble fiber is used as the core yarn layer, and polyurethane fiber is intermittently coated on the surface of the core yarn layer to form a core-spun layer, and graphene nanoparticles are loaded on the surface of the polyurethane fiber.

[0032] The preparation method of wool blend outdoor fabric includes the following steps:

[0033] (1) Preparation of the face fabric: The warp yarn is 150D polyester (weaving method is double 75D polyester yarn), and the weft yarn is polyester-wool composite yarn (weaving method is one 150D polyester yarn and one 16S wool yarn in a 1:1 ratio). The warp and weft yarns are woven by a fabric weaving machine to obtain the face fabric. The warp yarn weaving density is 20 yarns / cm and the weft yarn weaving density is 15 yarns / cm. The weaving structure is plain weave. The face fabric, by weight percentage, includes 80% polyester fiber and 20% wool fiber.

[0034] (2) Preparation of the base fabric: The base fabric is obtained by weaving 50D polypropylene fiber using a fabric weaving machine in a warp knitting manner;

[0035] (3) Immerse polyurethane fibers in graphene nanoparticle dispersion, then remove and dry them. Repeat the cycle 5 times to obtain polyurethane fibers loaded with graphene nanoparticles. Then, use water-soluble fibers as the core yarn layer and intermittently coat the polyurethane fibers on the surface of the core yarn layer to form a core-spun layer to obtain the core-spun yarn. The water-soluble fibers are selected from polyvinyl alcohol fibers commonly used in the field. The graphene nanoparticle dispersion refers to a solution in which graphene nanoparticles are dispersed, with a mass-volume concentration of 0.5 mg / ml and the dispersion solvent is N-methylpyrrolidone.

[0036] (4) Polyurethane was added to N,N-dimethylformamide and mixed evenly to obtain a polyurethane spinning solution with a mass concentration of 15%. The polyurethane spinning solution was centrifuged at a speed of 4500 r / min and a collection distance of 30 cm. The collected fibers were pressed to obtain a first base film. The core-spun yarn was placed perpendicularly to the warp and weft directions on the first base film. The intersection of the warp and weft directions is the position where the core-spun yarn is not covered with polyurethane fibers. The placement diagram is shown in the figure. Figure 2 As shown, the placement density of the warp and weft core-spun yarns is 15 yarns / cm. Then, the core-spun yarns are wetted by water vapor spraying (until the water-soluble fibers dissolve, which are polyvinyl alcohol fibers in this embodiment). Subsequently, the first base film is placed on the receiving substrate and spinning continues. The fibers are collected and pressed to obtain the graphene functional film.

[0037] (5) The wool blended outdoor fabric is obtained by hot-pressing the graphene functional film between the face fabric and the back fabric. The hot-pressing temperature is 150℃ and the pressure of the pressure roller is 6kg / cm. 2 The vehicle speed is 10 m / min.

[0038] Example 2

[0039] This embodiment provides a method for preparing a wool blend outdoor fabric, including the following steps:

[0040] (1) Preparation of the face fabric: The warp yarn is 150D polyester (weaving method is double 75D polyester yarn), and the weft yarn is polyester-wool composite yarn (weaving method is one 150D polyester yarn and one 16S wool yarn in a 1:1 ratio). The warp and weft yarns are woven by a fabric weaving machine to obtain the face fabric. The warp yarn weaving density is 35 yarns / cm and the weft yarn weaving density is 25 yarns / cm. The weaving structure is plain weave. The face fabric, by weight percentage, includes 60% polyester fiber and 40% wool fiber.

[0041] (2)-(3) Same as Example 1;

[0042] (4) Except that the placement density of the warp and weft core-spun yarns is 10 yarns / cm, the rest is the same as in Example 1;

[0043] (5) The wool blended outdoor fabric is obtained by hot-pressing the graphene functional film between the face fabric and the back fabric. The hot-pressing temperature is 180℃ and the pressure of the pressure roller is 4kg / cm. 2 The vehicle speed is 15 m / min.

[0044] Comparative Example 1

[0045] This comparative example provides a method for preparing a wool blend outdoor fabric, including the following steps:

[0046] (1) Preparation of the face fabric: (the weaving method is double-strand 75D polyester), the weft yarn is polyester-wool composite yarn (the weaving method is to weave one 150D polyester and one 16S wool in a 1:1 ratio). The warp and weft yarns are woven by a fabric weaving machine to obtain the face fabric. The warp yarn weaving density is 20 yarns / cm and the weft yarn weaving density is 15 yarns / cm. The weaving structure is plain weave. The face fabric, by weight percentage, includes 60% polyester fiber and 40% wool fiber.

[0047] (2)-(5) Same as Example 1.

[0048] Comparative Example 2

[0049] This comparative example provides a wool blend outdoor fabric, the fabric structure of which includes a base fabric and an outer fabric, the outer fabric being a polyester-wool blend knitted fabric, and the base fabric being a polypropylene warp-knitted fabric.

[0050] The preparation method of wool blend outdoor fabric includes the following steps:

[0051] (1) Preparation of the face fabric: The warp yarn is 150D polyester (weaving method is double 75D polyester yarn), and the weft yarn is polyester-wool composite yarn (weaving method is one 150D polyester yarn and one 16S wool yarn in a 1:1 ratio). The warp and weft yarns are woven by a fabric weaving machine to obtain the face fabric. The warp yarn weaving density is 20 yarns / cm and the weft yarn weaving density is 15 yarns / cm. The weaving structure is plain weave. The face fabric, by weight percentage, includes 80% polyester fiber and 20% wool fiber.

[0052] (2) Preparation of the base fabric: The base fabric is obtained by weaving 50D polypropylene fiber using a fabric weaving machine in a warp knitting manner;

[0053] (3) The wool blended outdoor fabric is obtained by hot-pressing the face fabric and the base fabric together. The hot-pressing temperature is 150℃ and the pressure of the pressure roller is 6kg / cm. 2 The vehicle speed is 10 m / min.

[0054] Comparative Example 3

[0055] This comparison presents a wool blend outdoor fabric, such as Figure 1 As shown, the fabric structure includes a base fabric, a face fabric, and a graphene functional film composited between the base fabric and the face fabric.

[0056] The outer fabric is a polyester-wool blend knitted fabric, and the base fabric is a polypropylene warp-knitted fabric.

[0057] The graphene functional membrane is made by centrifugal spinning of graphene nanoparticle dispersion mixed with polyurethane spinning solution in equal volume, collecting the fibers and pressing them.

[0058] The preparation method of wool blend outdoor fabric includes the following steps:

[0059] (1) Preparation of the face fabric: Same as in Example 1;

[0060] (2) Preparation of the base fabric: Same as in Example 1

[0061] (3) Polyurethane was added to N,N-dimethylformamide and mixed evenly to obtain a polyurethane solution with a mass concentration of 15%. Then, graphene nanoparticle dispersion with a mass-volume concentration of 0.5 mg / ml was added in equal proportion. The dispersion solvent was N-methylpyrrolidone to obtain a spinning solution. The spinning solution was centrifuged and spun at a speed of 4500 r / min and a collection distance of 30 cm. The collected fibers were pressed to obtain a first base film. Then, spinning was continued on the first base film. The collected fibers were pressed to obtain the graphene functional film. The graphene functional film (the thickness of the graphene functional film is consistent with that in Example 1) was obtained.

[0062] (4) Same as Example 1.

[0063] Comparative Example 4

[0064] The difference from Example 1 lies in step (5): polyurethane is added to N,N-dimethylformamide and mixed evenly to obtain a polyurethane spinning solution with a mass concentration of 15%. The polyurethane spinning solution is centrifuged at a speed of 4500 r / min and a collection distance of 30 cm. The collected fibers are pressed to obtain a first base film. The core-spun yarn is placed equidistantly on the first base film along the warp direction, as shown in the schematic diagram. Figure 3 As shown, the weft core-spun yarn is placed at a density of 15 yarns / cm. Then, the core-spun yarn is wetted by water vapor spraying (until the water-soluble fiber dissolves, which is polyvinyl alcohol fiber in this embodiment). Subsequently, the first base film is placed on the receiving substrate and spinning continues. The fibers are collected and pressed to obtain the graphene functional film.

[0065] Comparative Example 5

[0066] The difference from Example 1 lies in step (5): polyurethane is added to N,N-dimethylformamide and mixed evenly to obtain a polyurethane spinning solution with a mass concentration of 15%. The polyurethane spinning solution is then centrifuged at a speed of 4500 r / min and a collection distance of 30 cm. The collected fibers are pressed to obtain a first base film. The core-spun yarn is then placed equidistantly on the first base film along the weft direction, as shown in the schematic diagram. Figure 4 As shown, the weft core-spun yarn is placed at a density of 15 yarns / cm. Then, the core-spun yarn is wetted by water vapor spraying (until the water-soluble fiber dissolves, which is polyvinyl alcohol fiber in this embodiment). Subsequently, the first base film is placed on the receiving substrate and spinning continues. The fibers are collected and pressed to obtain the graphene functional film.

[0067] Comparative Example 6

[0068] The difference from Example 1 lies in steps (4) and (5):

[0069] (5) Immerse the hollow polyurethane short fibers in the graphene nanoparticle dispersion, then take them out and dry them. Repeat the cycle 5 times to obtain hollow polyurethane short fibers loaded with graphene nanoparticles.

[0070] (6) Polyurethane was added to N,N-dimethylformamide and mixed evenly to obtain a polyurethane spinning solution with a mass concentration of 15%. The polyurethane spinning solution was centrifuged at a speed of 4500 r / min and a collection distance of 30 cm. The collected fibers were pressed to obtain a first base film. Hollow polyurethane short fibers (the same size and amount as in Example 1) were placed on the first base film. The placement diagram is shown below. Figure 5 As shown, the weft core-spun yarn is placed at a density of 15 yarns / cm. Then, the core-spun yarn is wetted by water vapor spraying (until the water-soluble fiber dissolves, which is polyvinyl alcohol fiber in this embodiment). Subsequently, the first base film is placed on the receiving substrate and spinning continues. The fibers are collected and pressed to obtain the graphene functional film.

[0071] Comparative Example 7

[0072] The difference from Example 1 is in step (3): the polyurethane fiber surface is not loaded with graphene nanoparticles, that is, water-soluble fiber is used as the core yarn layer, and polyurethane fiber is intermittently wrapped on the surface of the core yarn layer to form a core-spun yarn.

[0073] The following performance tests were performed on Examples 1-2 and Comparative Examples 1-6:

[0074] 1. Air permeability and moisture permeability test

[0075] Air permeability test: Referring to the national standard (GB / T5433), the air permeability of the samples was tested using a YG461G fully automatic fabric air permeability meter. Specific experimental parameters were set as follows: ambient temperature 25℃, relative humidity 60%, pressure difference 100Pa, and air permeability area 20cm². 2 The nozzle diameter is 0.8mm. Ten tests were conducted on different parts of the fabric sample, and the average value was taken as the final air permeability data.

[0076] Moisture permeability test: The moisture permeability of the samples was tested using an FX3180 moisture permeability meter according to national standard GB / T12704.1-2009(a). During the test, the temperature was 38℃, the humidity was 90.0%, the airflow velocity was 0.5 m / s, and the test area was 28.3 cm². 2 Before testing, the test chamber needs to be pre-conditioned for humidity. After automatic humidity conditioning, the instrument begins the moisture permeability test, automatically recording moisture permeability data every hour for a total of two times. After the experiment is completed, the moisture permeability data of the samples are manually recorded, and the average of 10 sets of experimental data for each sample is used as the final data.

[0077] The results are shown in Table 1.

[0078] Table 1. Results of fabric breathability and moisture permeability test

[0079]

[0080] As can be seen from Table 1, firstly, the difference between Example 2 and Comparative Example 1 and Example 1 is that the wool fiber content in the fabric of the first two fabrics is 40%, which is greater than 20% in Example 1. In terms of air permeability and moisture permeability data, Example 1 is slightly lower than Example 2 and Comparative Example 1.

[0081] In Example 1, the core-spun yarn in the graphene functional film is placed perpendicularly and intersecting along the warp and weft directions. The intersection of the warp and weft directions marks the location where the core-spun yarn is not covered with polyurethane fibers. During the preparation of Example 1, after the core-spun yarn is placed on the first base film, it is moistened by water vapor spraying. The water-soluble fibers dissolve, and the core-spun yarn structure consists only of hollow polyurethane fibers distributed in a matrix on the first base film. This can improve the air permeability of the graphene functional film to a certain extent, thereby enhancing the air and moisture permeability of the fabric composited with this graphene functional film. In Comparative Examples 4-5, the core-spun yarn is placed along the radial and weft directions, respectively. After the water-soluble fibers dissolve, the core-spun yarn structure consists only of hollow polyurethane fibers distributed in a row on the first base film. Compared to Example 1, the air permeability is slightly lower.

[0082] In addition, unlike Example 1, Comparative Example 6 did not place core-spun yarn in the graphene functional film, but instead placed hollow polyurethane short fibers. Since the hollow polyurethane short fibers have a small structure, they cannot form a matrix distribution as consistent with Example 1 when placed on the film, and thus the air permeability and moisture permeability are slightly worse than those of Example 1.

[0083] Finally, the graphene functional film of Comparative Example 3 did not contain core-spun yarn, and the breathability and moisture permeability of the fabric were not as good as those of Example 1 and Comparative Example 7.

[0084] 2. Waterproof performance test

[0085] Hydrostatic pressure resistance test: The fabric was subjected to a hydrostatic pressure resistance test according to GB / T 4744-2013. Test method: The test water on the clamping surface was wiped clean, and the sample was clamped so that the front of the sample was in contact with the water. A continuously increasing water pressure was applied to the sample at a water pressure increase rate of 60 cm H2O / min, and the water seepage phenomenon was observed. During the pressure increase, the pressure was stopped when the third water droplet just appeared on the sample, and the hydrostatic pressure value at this time was recorded.

[0086] Waterproof performance test: In a standard laboratory, distilled water is sprayed onto the sample through a funnel, and the sample is rated according to the waterproof standard (European standard ISO 4920).

[0087] The results are shown in Table 2.

[0088] Table 2. Results of fabric water resistance test

[0089]

[0090] As shown in Table 2, the fabrics obtained in Examples 1-2 all have a water-repellent rating of 4 and a high hydrostatic pressure resistance, indicating excellent waterproof performance. Compared with Examples 1-2, Comparative Example 2 does not have a membrane between the outer fabric and the backing fabric, and therefore is not a membrane-insulated fabric, resulting in lower waterproof performance compared to Examples 1-2.

[0091] 3. Far-infrared performance test

[0092] Far-infrared performance test: The far-infrared performance of the fabric samples was tested according to GB / T30127-2013 "Test and evaluation of far-infrared performance of textiles" after 0 and 50 washes, with the far-infrared wavelength range of 8-15μm. The results are shown in Table 3.

[0093] Table 3. Results of Far-Infrared Performance Testing of Fabrics

[0094]

[0095] As shown in Table 3, due to the presence of the graphene functional film, Examples 1-2 have better far-infrared emissivity and far-infrared radiation temperature rise compared to Comparative Example 2. However, since the graphene functional film of Comparative Example 3 is made from a polyurethane spinning solution mixed with an equal volume of graphene nanoparticle dispersion, the amount of graphene nanoparticles loaded on the film is greater and more uniform. Therefore, the far-infrared performance of the fabric of Comparative Example 3 after 0 washes is better than that of Example 1.

[0096] Based on the far-infrared performance data of the fabric after 50 washes, Comparative Example 3 is not as good as Example 1. The reason is that in Example 1, the graphene nanoparticles are attached to the core layer of the core-spun yarn and are encapsulated inside the functional membrane. The graphene nanoparticles are not easily detached after washing, so the fabric still has good far-infrared performance after 50 washes.

[0097] 5. Antibacterial performance test

[0098] The antibacterial test method was based on GB / T 20944.2-2007 "Evaluation of Antibacterial Properties of Textiles" Part 2: Absorption Method. The test strains were Staphylococcus aureus ATCC No. 6538 (Gram-positive bacteria) and Escherichia coli 8099 (Gram-negative bacteria). According to the standard, the fabric was cut into 20mm×20mm pieces for antibacterial testing. The results are shown in Table 4.

[0099] Table 4. Results of fabric antibacterial performance test

[0100]

[0101] As can be seen from Table 5, due to the presence of the graphene functional film, Examples 1-2 have better antibacterial properties than Comparative Example 2. The reason why the antibacterial properties of Examples 1-2 are worse than those of Comparative Example 3 is that the functional film of Comparative Example 3 uses a polyurethane spinning solution mixed with an equal volume of graphene nanoparticle dispersion as raw material. The amount of graphene nanoparticles loaded on the film is greater and more uniform. Therefore, the antibacterial properties of the fabric of Comparative Example 3 after 0 washes are better than those of Example 1. However, judging from the antibacterial properties of the fabric after 50 washes, Comparative Example 3 is not as good as Example 1. The reason is that in Example 1, the graphene nanoparticles are attached to the core layer of the core-spun yarn and are encapsulated inside the functional film. The graphene nanoparticles are not easily detached after washing, and thus the fabric still has good antibacterial properties after 50 washes.

[0102] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A wool blend outdoor fabric, characterized in that: The fabric structure includes a face fabric, a back fabric, and a graphene functional film composited between the back fabric and the face fabric. The outer fabric is a polyester-wool blend knitted fabric, and the base fabric is a polypropylene warp-knitted fabric. The graphene functional membrane is made by using polyurethane spinning solution as raw material and composite core-spun yarn during centrifugal spinning; the structure of the core-spun yarn includes water-soluble fiber as core yarn layer and polyurethane fiber intermittently coated on the surface of the core yarn layer to form a core-spun layer, and the surface of the polyurethane fiber is loaded with graphene nanoparticles. The method for preparing the wool blended outdoor fabric includes the following steps: (1) Immerse polyurethane fibers in a graphene nanoparticle dispersion, then take them out and dry them. Repeat the cycle 2-5 times to obtain polyurethane fibers loaded with graphene nanoparticles. Then, use water-soluble fibers as the core yarn layer and intermittently coat the polyurethane fibers on the surface of the core yarn layer to form a core-spun layer, thus obtaining the core-spun yarn. (2) Prepare polyurethane spinning solution, centrifuge the polyurethane spinning solution, collect the fibers and press them to obtain a first base film, place core-spun yarn on the first base film, and then perform water vapor spray treatment to wet the core-spun yarn. Subsequently, place the first base film on the receiving substrate to continue spinning, collect the fibers and press them to obtain the graphene functional film. (3) The graphene functional film prepared in step (2) is placed between polyester-wool blended knitted fabric and polypropylene warp-knitted fabric and hot-pressed to obtain the wool blended outdoor fabric.

2. The wool blend outdoor fabric according to claim 1, characterized in that: The fabric is made of polyester fiber as warp and polyester fiber combined with wool fiber as weft. The warp density is 20-35 threads / cm and the weft density is 15-25 threads / cm. The weave structure is plain weave.

3. The wool blend outdoor fabric according to claim 1, characterized in that: The fabric comprises, by weight percentage, 60-80% polyester fiber and 20-40% wool fiber.

4. The wool blend outdoor fabric according to claim 1, characterized in that: The polyurethane spinning solution is obtained by adding polyurethane to N,N dimethylformamide and mixing them evenly, and the mass concentration of the polyurethane spinning solution is 15-20%.

5. The wool blend outdoor fabric according to claim 1, characterized in that: The specific step (2) is to place the core-spun yarn perpendicularly to the warp and weft directions. The intersection of the warp and weft directions is the position where the core-spun yarn is not covered with polyurethane fibers. The placement density of the warp and weft core-spun yarn is 10-15 yarns / cm.

6. The wool blend outdoor fabric according to claim 1, characterized in that: In step (2), the rotation speed of the centrifugal spinning is 4400-4600 r / min, the collection distance is 28-32 cm, the temperature is 25-28℃, and the relative humidity is 35-40%.

7. The wool blend outdoor fabric according to claim 1, characterized in that: In step (3), the hot-press bonding process parameters are: hot-press temperature of 150-180℃ and pressure roller pressure of 4-6 kg / cm. 2 The vehicle speed is 7-15 m / min.

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