Wool outdoor fabric based on aeronautical material and preparation method thereof

Abstract

The invention relates to a wool outdoor fabric based on aeronautical materials and a preparation method thereof, and relates to the technical field of fabrics, the wool outdoor fabric is obtained by weaving three-component composite yarns as warp and weft yarns to obtain base cloth, and then compounding a modified bio-based TPU film on the surface of one side of the base cloth; wherein the three-component composite yarn is prepared by taking ultra-high molecular weight polyethylene color master batch yarn as core yarn and alternately and spirally winding wool yarn and polyester color master batch yarn on the core yarn; the modified bio-based TPU film is prepared by carrying out ultraviolet-initiated grafting modification on the surface of a bio-based TPU film by using hexafluorobutyl methacrylate and a photoinitiator. According to the fabric provided by the invention, the problem of poor tear resistance of the wool yarns can be remarkably improved, the excellent performance of the wool material is fully played, and the comprehensive performance of the wool outdoor fabric is promoted to be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of fabrics, and in particular relates to a wool outdoor fabric based on aviation materials and a preparation method thereof. Background Art

[0002] The main raw material for high horsepower materials is ultra-high molecular weight polyethylene, which is widely used in the fields of aviation materials and military products due to its excellent strength performance. Ultra-high molecular weight polyethylene, referred to as UHMWPE, is an unbranched linear polyethylene with a molecular weight of more than 1.5 million. It has super wear resistance, self-lubrication, high strength, stable chemical properties, strong anti-aging performance, and excellent comprehensive performance.

[0003] Wool yarn is a high-end fiber material commonly used in daily clothing, but because the strength of wool is lower than that of other fibers, its application in outdoor fabrics is relatively limited. When developing outdoor fabrics, wool yarn can be considered to be blended with other high-strength fibers, such as the above-mentioned ultra-high molecular weight polyethylene. This has good research and development significance for promoting the application of wool yarn in outdoor clothing and improving the wearing comfort of outdoor fabrics. Summary of the invention

[0004] The purpose of the present invention is to provide a wool outdoor fabric based on aviation materials and a preparation method thereof in order to solve the above problems.

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

[0006] As a first aspect of the present invention, the present invention provides a wool outdoor fabric based on aviation materials, wherein the wool outdoor fabric is firstly obtained by weaving a base fabric with three-component composite yarn as warp and weft yarn, and then compounding a modified bio-based TPU film on one side of the base fabric;

[0007] Among them, the three-component composite yarn is prepared by alternately spirally winding wool yarn and polyester masterbatch yarn on the core yarn with ultra-high molecular weight polyethylene masterbatch yarn as the core yarn; the modified bio-based TPU film is prepared by ultraviolet light-induced grafting modification of the surface of the bio-based TPU film using hexafluorobutyl methacrylate and a photoinitiator.

[0008] As a further optimization scheme of the present invention, in the three-component composite yarn, the mass percentage of each yarn is 40-70% polyester masterbatch yarn, 20-50% wool yarn and 5-10% ultra-high molecular weight polyethylene masterbatch yarn.

[0009] As a second aspect of the present invention, the present invention also provides a method for preparing the wool outdoor fabric based on aviation materials as described above, which specifically comprises the following steps:

[0010] (1) firstly, using ultra-high molecular weight polyethylene masterbatch yarn as core yarn, alternately spirally winding wool yarn and polyester masterbatch yarn on the core yarn to prepare a three-component composite yarn, and then using the three-component composite yarn as warp and weft yarns to weave to obtain a base fabric;

[0011] (2) preparing a bio-based TPU membrane by electrospinning, and then pre-treating and cleaning the bio-based TPU membrane for use;

[0012] (3) adding hexafluorobutyl methacrylate and a photoinitiator to a solvent and stirring evenly to obtain a modified solution, immersing the bio-based TPU film prepared in step (2) in the modified solution, stirring under heating conditions to react, taking it out, placing it under ultraviolet light for irradiation and curing, and then washing it, and finally drying the bio-based TPU film at 60-70° C. for 3-5 hours to obtain a modified bio-based TPU film;

[0013] (4) A layer of hot-melt mesh is attached to the surface of the base fabric obtained in step (1), and the modified bio-based TPU film obtained in step (3) is stacked on the hot-melt mesh. The wool outdoor fabric based on aviation materials can be obtained by hot-pressing and laminating.

[0014] As a further optimization scheme of the present invention, in step (2), the preparation method of the bio-based TPU membrane is specifically as follows: the bio-based TPU is dissolved in a solvent and stirred evenly to obtain a spinning solution, a metal woven mesh with a roughened receiving surface is used as a receiving template, and the spinning solution is electrostatically spun onto the receiving template to obtain a bio-based TPU membrane.

[0015] As a further optimization scheme of the present invention, the process parameters of the electrospinning are specifically as follows: the spinning voltage is 16-20 kV, the receiving distance is 15-20 cm, the temperature is 20-25° C., the relative humidity is 40-50%, and the pore size of the metal woven mesh is 400-600 μm.

[0016] As a further optimization scheme of the present invention, in step (3), the process parameters of electrospinning are spinning voltage of 25-30 kV, receiving distance of 15-20 cm, temperature of 20-25° C., and relative humidity of 40-50%.

[0017] As a further optimization scheme of the present invention, the mass concentration of the bio-based TPU in the spinning solution is 15-20%.

[0018] As a further optimization scheme of the present invention, in step (4), the hot pressing time is 2-5 min, the pressure is 2 MPa, and the hot pressing temperature is 100-120°C.

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

[0020] (1) The present invention uses ultra-high molecular weight polyethylene masterbatch yarn as the core yarn, and prepares a three-component composite yarn by alternately spirally winding wool yarn and polyester masterbatch yarn on the core yarn. The three-component composite yarn is used as the warp and weft yarns to manufacture the base fabric. The high strength and other characteristics of ultra-high molecular weight polyethylene can effectively make up for the poor tear resistance of the wool yarn itself, ensure the hygroscopicity of the wool yarn, and improve the tear resistance of the wool outdoor fabric;

[0021] (2) The present invention adopts a roughened metal woven mesh as a receiving template and electrospins to prepare a bio-based TPU membrane with an interwoven structure and a certain surface roughness, which can promote the subsequent hydrophobic modification effect of the membrane and the composite effect with the base fabric, thereby ensuring the improvement of the hydrophobic properties of the fabric and the wear-resistant bonding strength of the membrane and the base fabric, thereby improving the comprehensive performance of the outdoor wool fabric. DETAILED DESCRIPTION

[0022] 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.

[0023] 1. Materials and reagents

[0024] In the following examples, any method not specified may be carried out according to conventional methods, and other materials, reagents, etc. used may be obtained through commercial channels unless otherwise specified.

[0025] 2. Methods

[0026] 2.1. Preparation of base fabric

[0027] (1) Preparation of ultra-high molecular weight polyethylene masterbatch yarn

[0028] 95% by mass of ultra-high molecular weight polyethylene (viscosity-average molecular weight of 2 million) and 5% by mass of masterbatch are melted to obtain a blend, the blend is melt-extruded through a screw extruder to obtain spun yarn, and the obtained spun yarn is then drawn to obtain ultra-high molecular weight polyethylene masterbatch yarn.

[0029] (2) Preparation of polyester masterbatch yarn

[0030] According to the same preparation method of ultra-high molecular weight polyethylene masterbatch yarn, 95% by mass of polyester chips and 5% by mass of masterbatch are prepared to obtain polyester masterbatch yarn.

[0031] (3) Preparation of wool yarn

[0032] According to the color selected by the masterbatch, the wool tops are subjected to low-temperature dyeing treatment of the corresponding color, and the specific steps are: the acid dye accounts for 2% of the weight percentage of the wool tops, the bath ratio is 1:20, the pH is adjusted to 5.5 by acetic acid-sodium acetate, the dyeing temperature is 50°C, the dyeing temperature is 30°C, the heating rate is 2°C / min, and the dyeing time is 60min. After the low-temperature dyeing of the wool tops is completed, they are soaped, washed with water, and dried, and then spun to form yarn to obtain wool yarn.

[0033] (3) Preparation of base fabric

[0034] First, ultra-high molecular weight polyethylene masterbatch yarn is used as the core yarn, and wool yarn and polyester masterbatch yarn are alternately spirally wound on the core yarn to prepare a three-component composite yarn, in which the mass percentage of each yarn is 45% polyester masterbatch yarn, 45% wool yarn and 10% ultra-high molecular weight polyethylene masterbatch yarn, and the fineness of the three-component composite yarn is 70 English count.

[0035] The three-component composite yarn is used as the warp and weft yarns to weave a base fabric A, wherein the weaving structure of the base fabric is a checkered pattern with a length and width of 0.6 cm, a weaving density of 75 yarns / 10 cm in warp density, and 65 yarns / 10 cm in weft density;

[0036] During the preparation of the base fabric, the composition of the three-component composite yarn is adjusted to prepare the base fabric BD. The specific adjustment scheme is as follows:

[0037] Base fabric B: ultra-high molecular weight polyethylene masterbatch fiber, polyester masterbatch fiber and wool fiber are prepared. The composite yarn used is a blended yarn prepared by blending ultra-high molecular weight polyethylene masterbatch fiber, polyester masterbatch fiber and wool fiber. The mass percentage of each yarn is 45% polyester masterbatch yarn, 45% wool yarn and 10% cotton yarn. The fineness of the three-component composite yarn is 70 English count.

[0038] Base fabric C: The composite yarn used is a three-component composite yarn prepared by alternately spirally winding wool yarn and polyester masterbatch yarn around the core yarn with cotton yarn as the core yarn. The mass percentage of each yarn is 45% polyester masterbatch yarn, 45% wool yarn and 10% cotton yarn. The fineness of the three-component composite yarn is 70 Ne;

[0039] Base fabric D: The composite yarn used is prepared by wrapping 50% by mass of polyester masterbatch yarn and 50% by mass of wool yarn.

[0040] 2.2 Preparation of wool outdoor fabrics

[0041] The preparation process and modification process of bio-based TPU film are adjusted. The specific adjustment plan is as follows:

[0042] Treatment Group 1:

[0043] (1) Preparation of bio-based TPU film

[0044] The bio-based TPU (bio-based content is about 65%, the brand is Lubrizol, USA) is dissolved in N, N-dimethylformamide and stirred evenly to obtain a spinning solution. The mass concentration of the bio-based TPU in the spinning solution is 20%. A metal woven mesh with a roughened receiving surface is used as a receiving template. The spinning solution is electrospun onto the receiving template to obtain a bio-based TPU membrane. The spinning voltage is 20 kV, the receiving distance is 20 cm, the temperature is 25°C, the relative humidity is 40%, and the pore size of the metal woven mesh is 600 μm.

[0045] (2) Preparation of modified bio-based TPU film

[0046] Hexafluorobutyl methacrylate and photoinitiator 6976 are added to polyvinyl pyrrolidone and stirred evenly to obtain a modified solution. In the modified solution, the mass concentration of hexafluorobutyl methacrylate is 20%. The prepared bio-based TPU film is immersed in the modified solution, stirred and reacted at 70°C for 30 minutes, taken out and irradiated under ultraviolet light (wavelength of 400nm) for 5 minutes, and the bio-based TPU film is cleaned after curing. Finally, it is dried at 70°C for 3 hours to obtain a modified bio-based TPU film.

[0047] Treatment group 2: When preparing the bio-based TPU film, a metal plate was used as the receiving template, and the other steps were the same as those of treatment group 1.

[0048] Treatment group 3: When preparing the bio-based TPU film, the receiving surface of the metal woven mesh used was not roughened, and the other steps were the same as those of treatment group 1.

[0049] Treatment group 4: The difference from treatment group 2 is that before the bio-based TPU film is modified, the PP surface is etched with 30 mV plasma for 10 s. The other steps are the same as those of treatment group 2.

[0050] Treatment group 5: When preparing the modified bio-based TPU film, hexafluorobutyl methacrylate and photoinitiator 6976 were added to polyvinyl pyrrolidone and stirred evenly to obtain a modified solution. In the modified solution, the mass concentration of hexafluorobutyl methacrylate was 20%. The prepared bio-based TPU film was immersed in the modified solution and stirred for reaction for 30 minutes, taken out, and dried at 70°C for 3 hours. The other steps were the same as those of treatment group 1.

[0051] Treatment group 6: When preparing the modified bio-based TPU film, hexafluorobutyl methacrylate was replaced with dodecafluoroheptyl methacrylate, and the other steps were the same as those of treatment group 1.

[0052] Modified bio-based TPU films 1-6 were prepared according to the above treatment groups.

[0053] (3) Fabric preparation

[0054] A layer of hot-melt mesh is attached to the surface of the base fabric A obtained in step 2.1, and the modified bio-based TPU films 1-6 are stacked on the hot-melt mesh. The wool outdoor fabric af is obtained by hot pressing and compounding. The hot pressing time is 5 minutes, the pressure is 2 MPa, and the hot pressing temperature is 120°C.

[0055] 3. Performance testing

[0056] 3.1. Tear resistance test of base fabric AD

[0057] The test was conducted according to GB / T3917-1:2009 "Tear properties of fabrics - Part 1 - Determination of tear strength by impact pendulum method". In addition, a base fabric made of pure wool yarn of the same fineness was used as control group 1, and the results are shown in Table 1.

[0058] Table 1 Tear resistance test results

[0059]

[0060] As can be seen from Table 1, compared with the base fabric prepared from pure wool yarn (control group 1), the base fabric prepared from the composite yarn prepared from multiple components has better tear resistance. Among them, the three-component composite yarn used in the base fabric A is prepared by using ultra-high molecular weight polyethylene masterbatch yarn as the core yarn, and wool yarn and polyester masterbatch yarn are alternately spirally wound on the core yarn. Due to the good impact resistance and tear resistance of ultra-high molecular weight polyethylene, the base fabric A has better tear resistance, which can make up for the disadvantages of poor mechanical properties of wool yarn when composited with wool yarn.

[0061] 3.2. Hygroscopicity test of base fabric AD

[0062] Hygroscopicity test: refer to FZ / T 01071-2008 "Test method for capillary effect of textiles", use YG871 capillary effect tester to measure the wicking height of base fabrics AD and control group 1, cut a long strip sample 100mm away from the edge of the fabric and with a size of 30mm×250mm, and record the maximum value of the liquid rise of the sample after 30min.

[0063] The results are shown in Table 2.

[0064] Table 2 Hygroscopicity test results

[0065]

[0066] As can be seen from Table 2, the base fabric prepared from pure wool yarn (control group 1) has a higher wicking height and the best hygroscopicity, while base fabric C is second. Compared with base fabric B, base fabric A has higher hygroscopicity than base fabric B. The reason is that the outer layer of the three-component composite yarn used in base fabric A is composed of wool yarn and polyester masterbatch yarn, while the three-component composite yarn used in base fabric B is a blended yarn. The structure of the yarn is composed of ultra-high molecular weight polyethylene masterbatch yarn, wool yarn and polyester masterbatch yarn. The distribution ratio of its chemical fiber is higher than that of the outer layer of the three-component composite yarn used in base fabric A, and thus the performance of the base fabric in terms of hygroscopicity is not as good as that of base fabric A.

[0067] 3.3 Performance test of modified bio-based TPU film

[0068] (1) Contact angle test: According to DB44T1872-2016 "Contact angle method for determining the wettability of textile surfaces", drop 5 μL of deionized water on the sample surface and let it stand for 30 seconds. The contact angle is calculated using the five-point fitting method. Test 5 different positions on each sample and take the average value of the results.

[0069] (2) Tensile property test: The tensile properties of the modified bio-based TPU film were tested according to ISO527-2:2012, with a tensile rate of 500 mm / min.

[0070] The results are shown in Table 3.

[0071] Table 3 Performance test results

[0072]

[0073] It can be seen from Table 3 that in terms of waterproof performance, the waterproof performance of the film sample after hydrophobic modification is greatly improved, and the water contact angle on the surface of the modified bio-based TPU film 1 is greater than 150° to obtain a super hydrophobic surface.

[0074] When preparing the modified bio-based TPU membrane 1, a roughened metal woven mesh was used as a receiving template. By comparing the results of the modified bio-based TPU membranes 2-3, it can be seen that the above-mentioned means have a positive effect on improving the effect of subsequent hydrophobic modification. The use of a roughened metal woven mesh as a receiving template can form an interwoven structure on the surface of the bio-based TPU membrane with high surface roughness, which is beneficial to the grafting of the modified components when ultraviolet light is used to initiate the modification, thereby greatly improving the hydrophobicity of the membrane surface.

[0075] Modified bio-based TPU film 4 is different from modified bio-based TPU film 1. It uses plasma etching to improve the surface roughness of the film. From the test results of the mechanical properties of the film samples, this treatment method will affect the mechanical properties of the film. The water resistance of modified bio-based TPU film 5 is not as good as that of modified bio-based TPU film 1, indicating that the use of ultraviolet light-induced modification is better than ordinary dipping methods in improving the hydrophobic modification effect of the film sample.

[0076] 3.4. Abrasion resistance and bonding fastness test of outdoor wool fabrics

[0077] The Y571B type friction color fastness tester was used, and the standard wool abrasive was used. The coated side of the wool outdoor fabric af was placed on the circular friction head (flat grinding) of the sponge cushion layer for friction test (the number of frictions was 400 times). Each sample was tested 5 times, and the results were averaged. Wet treatment refers to soaking the fabric in water for 3 hours, and the liquid waiting rate during the friction test is 30%. The results are shown in Table 3. In addition, the fabric obtained by compounding the unmodified bio-based TPU film with the base fabric according to the above method was used as the control group 2.

[0078] Table 4 Abrasion resistance bonding fastness test results

[0079]

[0080]

[0081] It can be seen from Table 4 that the wool outdoor fabric a obtained by compounding the modified bio-based TPU film 1 with the base fabric has the best wear-resistant bonding degree. The roughened metal woven mesh is used as the receiving template to form a surface with a certain degree of roughness in the prepared film sample. The hot-melt mesh film is then compounded with the base fabric to improve the bonding between the film and the base fabric, thereby enabling the fabric to obtain a better wear-resistant bonding degree. The modified bio-based TPU film 4 used in the wool outdoor fabric d forms a surface with a certain degree of roughness by plasma etching the film surface, but its influence on the mechanical properties of the film sample makes the wear-resistant bonding degree of the finally prepared wool outdoor fabric d inferior to that of the wool outdoor fabric a.

[0082] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention.

Claims

1. A wool outdoor fabric based on aviation materials, characterized by: The wool outdoor fabric is obtained by first weaving a base fabric with three-component composite yarn as warp and weft yarn, and then compounding a modified bio-based TPU film on one surface of the base fabric; Among them, the three-component composite yarn is prepared by alternately spirally winding wool yarn and polyester masterbatch yarn on the core yarn with ultra-high molecular weight polyethylene masterbatch yarn as the core yarn; the modified bio-based TPU film is prepared by ultraviolet light-induced grafting modification of the surface of the bio-based TPU film using hexafluorobutyl methacrylate and a photoinitiator.

2. The wool outdoor fabric based on aviation material according to claim 1, characterized in that: In the three-component composite yarn, the mass percentage of each yarn is 40-70% polyester masterbatch yarn, 20-50% wool yarn and 5-10% ultra-high molecular weight polyethylene masterbatch yarn.

3. A method for preparing the wool outdoor fabric based on aviation materials as claimed in any one of claims 1-2, characterized in that: The specific steps include: (1) firstly, using ultra-high molecular weight polyethylene masterbatch yarn as core yarn, alternately spirally winding wool yarn and polyester masterbatch yarn on the core yarn to prepare a three-component composite yarn, and then using the three-component composite yarn as warp and weft yarns to weave to obtain a base fabric; (2) preparing a bio-based TPU membrane by electrospinning, and then pre-treating and cleaning the bio-based TPU membrane for use; (3) Hexafluorobutyl methacrylate and a photoinitiator are added to a solvent and stirred evenly to obtain a modified solution, the bio-based TPU film prepared in step (2) is immersed in the modified solution, stirred for reaction under heating conditions, taken out, placed under ultraviolet light for curing, and then cleaned, and finally, the bio-based TPU film is dried at 60-70° C. for 3-5 hours to obtain a modified bio-based TPU film. (4) A layer of hot-melt mesh is attached to the surface of the base fabric obtained in step (1), and the modified bio-based TPU film obtained in step (3) is stacked on the hot-melt mesh. The wool outdoor fabric based on aviation materials can be obtained by hot-pressing and laminating.

4. The method for preparing a wool outdoor fabric based on aviation materials according to claim 3, characterized in that: In step (2), the preparation method of the bio-based TPU film is specifically as follows: the bio-based TPU is dissolved in N, N-dimethylformamide and stirred evenly to obtain a spinning solution, a metal woven mesh with a roughened receiving surface is used as a receiving template, and the spinning solution is electrostatically spun onto the receiving template to obtain a bio-based TPU film.

5. The method for preparing a wool outdoor fabric based on aviation materials according to claim 4, characterized in that: The process parameters of the electrospinning are specifically as follows: a spinning voltage of 16-20 kV, a receiving distance of 15-20 cm, a temperature of 20-25° C., a relative humidity of 40-50%, and a pore size of the metal woven mesh of 400-600 μm.

6. The method for preparing a wool outdoor fabric based on aviation materials according to claim 4, characterized in that: The mass concentration of the bio-based TPU in the spinning solution is 15-20%.

7. The method for preparing a wool outdoor fabric based on aviation materials according to claim 3, characterized in that: In step (4), the hot pressing time is 2-5 minutes, the pressure is 2 MPa, and the hot pressing temperature is 100-120°C.

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