A wool outdoor fabric based on aviation material and a preparation method thereof

Abstract

The present application relates to a kind of wool outdoor fabric based on aviation material and its preparation method, it relates to fabric technical field, the wool outdoor fabric is first with three-component composite yarn as warp and weft yarn and is woven to obtain base cloth, then the modified biobased TPU film is obtained on the one side surface of base cloth;Wherein, the three-component composite yarn is with ultra-high molecular weight polyethylene color master batch yarn as core yarn, by alternatively spiral winding wool yarn and polyester color master batch yarn on core yarn and is prepared to obtain;The modified biobased TPU film is using methyl methacrylate hexafluorobutyl ester and photo initiator to the surface of biobased TPU film is carried out ultraviolet light initiation graft modification and is formed.The fabric provided by the present application can significantly improve the problem that the tear resistance of wool yarn itself is not good, while fully exerting the excellent performance of wool material, promote the improvement of the comprehensive performance of wool outdoor fabric.

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 primary raw material for high-horsepower materials is ultra-high molecular weight polyethylene (UHMWPE), which is widely used in aviation materials and military applications due to its excellent strength. UHMWPE, or UHMWPE for short, is an unbranched, linear polyethylene with a molecular weight of over 1.5 million. It boasts exceptional wear resistance, self-lubrication, high strength, chemical stability, and strong aging resistance, resulting in excellent overall performance.

[0003] Wool yarn is a high-end fiber material commonly used in daily clothing, but because wool has lower strength than other fibers, its application in outdoor fabrics is relatively limited. When developing outdoor fabrics, it is possible to consider blending wool yarn 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 first woven with a three-component composite yarn as the warp and weft yarns to obtain a base fabric, and then a modified bio-based TPU film is composited on one surface 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 formed 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 solution 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) First, ultra-high molecular weight polyethylene masterbatch yarn is used as the core yarn, wool yarn and polyester masterbatch yarn are alternately spirally wound on the core yarn to prepare a three-component composite yarn, and then the three-component composite yarn is used as the warp and weft yarns to obtain a base fabric;

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

[0012] (3) adding hexafluorobutyl methacrylate and a photoinitiator to a solvent and stirring uniformly to obtain a modified solution, immersing the bio-based TPU film prepared in step (2) in the modified solution, stirring the reaction under heating conditions, taking it out, placing it under ultraviolet light for curing, and then washing it. 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 electrospun onto the receiving template to obtain a bio-based TPU membrane.

[0015] As a further optimization solution of the present invention, 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.

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

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

[0018] As a further optimization solution 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 of ultra-high molecular weight polyethylene can effectively compensate for the poor tear resistance of the wool yarn itself, ensuring that the hygroscopicity of the wool yarn is exerted while improving 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, 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. Other materials and reagents 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 above masterbatch, the wool tops are subjected to low-temperature dyeing treatment of the corresponding color, and the specific steps are as follows: the acid dye accounts for 2% by weight 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 60 minutes. After the low-temperature dyeing of the wool tops is completed, they are soaped, washed with water, and dried, and then spun into 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 the three-component composite yarn, 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.

[0035] The three-component composite yarn is then 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 and 65 yarns / 10 cm in weft;

[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 were prepared. The composite yarn used was 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 was 45% polyester masterbatch yarn, 45% wool yarn and 10% cotton yarn. The fineness of the three-component composite yarn was 70 Ne.

[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 a cotton core yarn. The weight 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 and modification processes of bio-based TPU films are adjusted. The specific adjustment plans are as follows:

[0042] Treatment Group 1:

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

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

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

[0046] 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, stirred and reacted at 70°C for 30 minutes, then taken out and irradiated under ultraviolet light (wavelength of 400nm) for 5 minutes. After curing, the bio-based TPU film was cleaned and finally 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 flat 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 30mV plasma for 10s. The other steps are the same as those in 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, then 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 laminating. 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. 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 made of pure wool yarn (Control Group 1), the base fabric prepared with a multi-component composite yarn has better tear resistance. Among them, the three-component composite yarn used in base fabric A is prepared by alternately spirally winding wool yarn and polyester masterbatch yarn around an ultra-high molecular weight polyethylene masterbatch yarn as the core yarn. Due to the excellent impact resistance and tear resistance of ultra-high molecular weight polyethylene, base fabric A has better tear resistance, which can compensate for the disadvantages of wool yarn's poor mechanical properties when composited with wool yarn.

[0061] 3.2. Hygroscopicity test of base fabric AD

[0062] Hygroscopicity test: Referring to FZ / T 01071-2008 "Test method for capillary effect of textiles", the wicking height of base fabrics AD and control group 1 was measured using a YG871 capillary effect tester. Long strips of samples measuring 30mm x 250mm were cut 100mm away from the edge of the fabric and recorded the maximum liquid rise after 30 minutes.

[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 made of pure wool yarn (Control Group 1) has a higher wicking height and the best hygroscopicity, followed by Base Fabric C. 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 yarn structure consists of ultra-high molecular weight polyethylene masterbatch yarn, wool yarn, and polyester masterbatch yarn. Its chemical fiber distribution ratio 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 inferior to 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 Determination of Wettability of Textile Surfaces," a 5 μL drop of deionized water was placed on the sample surface and allowed to stand for 30 seconds. The contact angle was calculated using the five-point fitting method. Five different locations were tested on each sample, and the results were averaged.

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

[0070] The results are shown in Table 3.

[0071] Table 3 Performance test results

[0072]

[0073] As can be seen from Table 3, in terms of waterproof performance, the waterproof performance of the membrane sample after hydrophobic modification is greatly improved, and the water contact angle of the surface of the modified bio-based TPU membrane 1 is greater than 150°, obtaining a superhydrophobic 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 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. The subsequent use of ultraviolet light to initiate modification is conducive to the grafting of modified components, thereby greatly improving the hydrophobicity of the membrane-like surface.

[0075] Modified Bio-based TPU Membrane 4 differs from Modified Bio-based TPU Membrane 1 in that it uses plasma etching to increase its surface roughness. Mechanical properties testing of the membranes indicates that this treatment affects their mechanical properties. Modified Bio-based TPU Membrane 5 is less water-resistant than Modified Bio-based TPU Membrane 1, demonstrating that UV-induced modification is more effective in improving the hydrophobicity of membranes than conventional impregnation.

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

[0077] A Y571B Crockmeter was used with a standard wool abrasive. The film-coated side of the wool outdoor fabric af was placed on a circular abrasive head (flat abrasive) with a sponge pad and subjected to friction testing (400 rubs). Each sample was tested five times, and the results were averaged. Wet treatment refers to soaking the fabric in water for three hours, with a 30% wet-treatment ratio during the friction test. The results are shown in Table 3. In addition, a fabric composited with an unmodified bio-based TPU film and a base fabric using the above method served as control group 2.

[0078] Table 4 Abrasion resistance test results

[0079]

[0080]

[0081] As can be seen from Table 4, 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. By using a roughened metal woven mesh as a receiving template, the prepared membrane sample forms a surface with a certain degree of roughness and a structural interweaving. When the hot-melt mesh is then compounded with the base fabric, the bonding between the membrane and the base fabric is improved, thereby enabling the fabric to obtain a better wear-resistant bonding. 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 membrane surface, but its influence on the mechanical properties of the membrane sample makes the wear-resistant bonding of the finally prepared wool outdoor fabric d inferior to that of the wool outdoor fabric a.

[0082] The above embodiments merely illustrate 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 a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, and all such variations and improvements fall within the scope of protection 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 yarns, and then compounding a modified bio-based TPU film on one side of the base fabric surface; The three-component composite yarn is prepared by alternately spirally winding wool yarn and polyester masterbatch yarn around an ultra-high molecular weight polyethylene masterbatch yarn as a core yarn, wherein the mass percentage of each yarn in the three-component composite yarn is 40-70% polyester masterbatch yarn, 20-50% wool yarn and 5-10% ultra-high molecular weight polyethylene masterbatch yarn; The modified bio-based TPU film is formed by using hexafluorobutyl methacrylate and a photoinitiator to perform ultraviolet light-induced grafting modification on the surface of a bio-based TPU film. Specifically, the bio-based TPU film is pre-treated and cleaned before use, and hexafluorobutyl methacrylate and a photoinitiator are added to a solvent and stirred evenly to obtain a modified solution. The prepared bio-based TPU film is immersed in the modified solution, stirred under heating conditions, and then taken out, placed under ultraviolet light for curing, and then washed. Finally, the bio-based TPU film is dried at 60-70° C. for 3-5 hours to obtain the modified bio-based TPU film. The preparation method of the bio-based TPU film is specifically as follows: 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 electrospun onto the receiving template to obtain the bio-based TPU film.

2. A method for preparing the wool outdoor fabric based on aviation materials according to claim 1, characterized in that: The specific steps include: (1) First, ultra-high molecular weight polyethylene masterbatch yarn is used as the core yarn, wool yarn and polyester masterbatch yarn are alternately spirally wound on the core yarn to prepare a three-component composite yarn, and then the three-component composite yarn is used as the warp and weft yarns to obtain the base fabric; (2) First, prepare the bio-based TPU film by electrospinning, and then pre-treat and clean the bio-based TPU film 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 under heating conditions for reaction, taken out, placed under ultraviolet light for curing, and then washed. 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.

3. The method for preparing a wool outdoor fabric based on aviation materials according to claim 2, characterized in that: The electrospinning process parameters are 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.

4. The method for preparing a wool outdoor fabric based on aviation materials according to claim 2, characterized in that: The mass concentration of the bio-based TPU in the spinning solution is 15-20%.

5. The method for preparing a wool outdoor fabric based on aviation materials according to claim 2, characterized in that: 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.

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