Camouflage color composite fabric and preparation method thereof

Abstract

The invention relates to the technical field of functional textiles, in particular to camouflage color composite fabric and a preparation method thereof. The preparation method of the camouflage color composite fabric comprises the following steps: mixing a flame retardant, an antistatic agent and a stealth material to obtain a composite modifier; the composite modifier is mixed with PA66 resin slices and PET resin slices, melt spinning, cooling, drafting and short cutting are carried out, and PA66 fibers and PET fibers are obtained; pA66 fibers and PET fibers are blended to obtain blended yarns, the blended yarns serve as warp yarns and weft yarns respectively, fabric is spun through a weaving technology, and gray fabric is obtained; the gray fabric is sequentially subjected to camouflage printing treatment, ageing treatment and water washing treatment, and the camouflage composite fabric is obtained. The prepared camouflage color composite fabric has the antistatic performance, the flame retardant performance and the moisture absorption and sweat releasing performance.

Description

Technical Field

[0001] The present invention relates to the technical field of functional textiles, and in particular to a camouflage composite fabric and a preparation method thereof. Background Art

[0002] Camouflage is a commonly used optical camouflage method. Camouflage is categorized based on terrain and other background conditions, generally including forest camouflage, desert camouflage, snow camouflage, ocean camouflage, wilderness camouflage, and mountain camouflage. Camouflage paint is sprayed onto the surface to blend in with the background, thereby achieving concealment and protecting the enemy. Camouflage fabrics, specifically, are created by applying a camouflage pattern onto a fabric base using a pigment printing process. These fabrics can be used to create military camouflage uniforms for field use, achieving camouflage and concealment to protect combatants.

[0003] Because field combat often involves high-mobility tactical maneuvers such as crawling and climbing, the strength and wear resistance of fabrics used in field combat uniforms are highly demanding. Synthetic fibers such as polyester (PET) and nylon (PA) offer high strength and wear resistance and are commonly used in field combat uniforms. Chinese patent application CN102493169A discloses a method for producing highly effective moisture-wicking nylon and nylon blended fabrics. These fabrics exhibit excellent wear resistance and are irradiated using a low-temperature plasma spray gun. After irradiation, alkyl sulfonates, alkyl phosphates, or quaternary ammonium salts are grafted onto the fabric surface, stabilizing and enhancing its hydrophilicity, thereby enhancing the fabric's moisture-wicking properties. However, polyester and nylon are prone to generating static electricity when rubbed in a dry environment, which poses a hidden danger to personal safety and may also interfere with electronic equipment and affect combat plans. Therefore, it is necessary to improve the anti-static properties of polyester / nylon composite fabrics. In addition, the battlefield environment of field combat may be prone to explosions and contact with burning materials, so the composite fabric is also required to have good flame retardancy. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides a camouflage composite fabric and a preparation method thereof, so as to solve the problem in the prior art that the antistatic performance and flame retardant performance of polyester / nylon composite fabrics need to be improved.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A method for preparing a camouflage composite fabric comprises the following steps:

[0007] Step 1: mixing a flame retardant, an antistatic agent, and a stealth material to obtain a composite modifier;

[0008] Step two, the composite modifier is mixed with PA66 resin chip, melted, to obtain a melt, the melt is sprayed through a special-shaped nozzle, cooled, drawn, and cut to obtain a special-shaped cross-section PA66 fiber;

[0009] The composite modifier is mixed with PET resin chip, melted, to obtain a melt, the melt is sprayed through a special-shaped nozzle, cooled, drawn, and cut to obtain a special-shaped cross-section PET fiber;

[0010] Step three, the special-shaped cross-section PA66 fiber is blended with the special-shaped cross-section PET fiber to obtain a blended yarn;

[0011] The blended yarn is used as warp and weft respectively to spin a fabric through a weaving process to obtain a gray cloth;

[0012] Step four, the gray cloth is sequentially subjected to a camouflage printing treatment, a steaming treatment, and a washing treatment to obtain a camouflage camouflage composite fabric.

[0013] Preferably, in the step one, the mass ratio of the flame retardant, the antistatic agent, and the stealth material is (10-20):(8-16):(10-20);

[0014] The flame retardant comprises magnesium hydroxide and diantimony trioxide;

[0015] The antistatic agent comprises carbon nanotubes;

[0016] The stealth material comprises indium tin oxide (ITO).

[0017] Preferably, in the step two, when the special-shaped cross-section PA66 fiber is prepared, the mass ratio of the composite modifier to the PA66 resin chip is (6-10):100, and the melting temperature is 270-290°C.

[0018] Preferably, in the step two, when the special-shaped cross-section PET fiber is prepared, the mass ratio of the composite modifier to the PET resin chip is (6-10):100, and the melting temperature is 260-280°C.

[0019] Preferably, in the step three, the mass ratio of the special-shaped cross-section PA66 fiber to the special-shaped cross-section PET fiber is (25-45):(55-75), and the yarn count of the blended yarn is 30-50S.

[0020] Preferably, in the step three, the warp density of the gray cloth is 180-220 roots / inch, and the weft density is 160-200 roots / inch.

[0021] Preferably, in the step four, the camouflage printing agent used for the camouflage printing treatment is prepared from a dispersing dye, an acid dye, a reactive dye, sodium alginate, urea, and deionized water;

[0022] In the camouflage printing material, the concentration of disperse dye is 25-35 g / L, the concentration of acid dye is 50-70 g / L, the concentration of reactive dye is 50-60 g / L, the concentration of sodium alginate is 100-200 g / L, and the concentration of urea is 8-12 g / L.

[0023] Preferably, in step 4, the conditions for the steaming treatment include: steaming at a temperature of 165-175° C. and a speed of 35-45 m / min.

[0024] Preferably, in the step 4, the washing treatment includes washing the evaporated grey cloth with a washing liquid;

[0025] Among them, the water washing temperature is 60-70℃;

[0026] The washing solution is prepared by including soda ash (sodium carbonate), hydrosulfite (sodium dithionite), non-ionic detergent and deionized water;

[0027] The mass percentage of soda ash in the washing liquid is 1.5%-2.5%, the mass percentage of hydrosulfite is 0.6%-1%, and the mass percentage of non-ionic detergent is 0.8%-1.2%.

[0028] The present invention also discloses a camouflage composite fabric prepared by adopting the above-mentioned preparation method of the camouflage composite fabric.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] In the present invention, PET resin and PA66 resin are used as the resin matrix to prepare the composite fabric. PET can give the fabric good shape retention, and PA66 can give the fabric good wear resistance and high strength. When the composite fabric is used as military camouflage combat uniform, it is suitable for high-mobility tactical actions such as crawling and climbing, and the fabric has a long service life.

[0031] By introducing flame retardants into PET resin and PA66 resin, the flame retardant properties of the composite fabric can be effectively improved. When the composite fabric is used as military camouflage combat uniforms, it can protect combatants from flames, explosions, or high temperatures in extreme environments. The flame retardants include magnesium hydroxide and antimony trioxide, and the two flame retardant components work synergistically to achieve a good flame retardant effect.

[0032] By introducing antistatic agents into PET resin and PA66 resin, the antistatic properties of the composite fabric can be effectively improved. This can prevent static electricity accumulation caused by friction during tactical movements in dry environments, desert combat, or winter operations, which can lead to problems such as accidental contact with explosives, interference with electronic equipment, and even exposure of targets. Carbon nanotubes have ultra-high electrical conductivity and form three-dimensional conductive pathways in the fibers. Even at low addition levels, they can significantly reduce the amount of static charge accumulated per unit area, resulting in excellent antistatic properties. Furthermore, carbon nanotubes are physically embedded in PA66 and PET fibers, making them resistant to washing and friction, and providing long-lasting antistatic properties.

[0033] Infrared stealth materials require low emissivity and high reflectivity within the atmospheric window, while radar stealth materials require the highest possible absorptivity and lowest possible reflectivity in microwave and millimeter waves, thereby minimizing the radar cross-section. Indium tin oxide, as a doped oxide semiconductor, can meet the requirements of infrared and radar composite stealth. Introducing indium tin oxide as a stealth material into PET resin and PA66 resin can effectively improve the stealth function of the composite fabric and provide high camouflage.

[0034] Finally, since both PA66 fiber and PET fiber have a special-shaped cross-sectional structure, the grooves of the special-shaped cross-section form micro-channels, which accelerate the directional movement of liquid water along the longitudinal direction of the fiber through capillary action, promoting water diffusion and evaporation. At the same time, the surface area of ​​the special-shaped cross-section is large, and more surface area is in contact with water, which can accelerate the evaporation rate and make the composite fabric have good moisture absorption and perspiration performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Graph showing the charge surface density test results of the camouflage composite fabrics prepared in Examples 1-5 and Comparative Examples 1-2 of the present invention;

[0036] Figure 2 Graph showing the limiting oxygen index test results of the camouflage composite fabrics prepared in Examples 1-5 and Comparative Examples 1-2 of the present invention;

[0037] Figure 3 Graph showing the test results of water drop diffusion time of the camouflage composite fabrics prepared in Examples 1-5 and Comparative Examples 1-2 of the present invention;

[0038] Figure 4 This is a graph showing the wicking height test results of the camouflage composite fabrics prepared in Examples 1-5 and Comparative Examples 1-2 of the present invention. DETAILED DESCRIPTION

[0039] Unless otherwise specified, the substances used in the examples and comparative examples of the present invention are common commercially available chemicals.

[0040] Example 1

[0041] The embodiment discloses a preparation method of a camouflage camouflage composite fabric, comprising the following steps:

[0042] Step one, mix magnesium hydroxide and antimony trioxide, carbon nanotubes and indium tin oxide, and the mass ratio of magnesium hydroxide, antimony trioxide, carbon nanotubes and indium tin oxide is 5:5:8:10 to obtain a composite modifier;

[0043] Step two, mix the composite modifier with PA66 resin chips, and the mass ratio of the composite modifier and the PA66 resin chips is 6:100, melt to obtain a melt, and the melt is sprayed through a special-shaped spinneret hole, the temperature of the melt is 280℃, the shape of the cross section of the special-shaped spinneret hole is cross-shaped, and the melt is cooled, drawn, cut and shortened to obtain a special-shaped cross-section PA66 fiber;

[0044] The fineness of the special-shaped cross-section PA66 fiber is 1.5dtex, and the average length of the special-shaped cross-section PA66 fiber is 38mm;

[0045] Mix the composite modifier with PET resin chips, and the mass ratio of the composite modifier and the PET resin chips is 6:100, melt to obtain a melt, and the melt is sprayed through a special-shaped spinneret hole, the temperature of the melt is 270℃, the shape of the cross section of the special-shaped spinneret hole is cross-shaped, and the melt is cooled, drawn, cut and shortened to obtain a special-shaped cross-section PET fiber;

[0046] The fineness of the special-shaped cross-section PET fiber is 1.5dtex, and the average length of the special-shaped cross-section PET fiber is 38mm;

[0047] Step three, blend the special-shaped cross-section PA66 fiber and the special-shaped cross-section PET fiber, and the mass ratio of the special-shaped cross-section PA66 fiber and the special-shaped cross-section PET fiber is 35:65 to obtain a blended yarn, and the yarn count of the blended yarn is 40S;

[0048] The blended yarn is used as warp yarn and weft yarn respectively, and a fabric is spun through a weaving process to obtain a gray fabric, and the warp density of the gray fabric is 200 roots / inch, and the weft density is 180 roots / inch;

[0049] Step four, the gray fabric is sequentially subjected to camouflage printing treatment, steaming treatment and washing treatment to obtain a camouflage camouflage composite fabric;

[0050] The camouflage printing material used in the camouflage printing treatment is prepared from dispersed dye dispersed blue 2BLN, acid dye acid orange NM-2RL, reactive dye tender yellow K-6G, sodium alginate, urea and deionized water;

[0051] In the camouflage printing material, the concentration of disperse dye Disperse Blue 2BLN is 30 g / L, the concentration of acid dye Acid Orange NM-2RL is 60 g / L, the concentration of reactive dye Bright Yellow K-6G is 55 g / L, the concentration of sodium alginate is 150 g / L, and the concentration of urea is 10 g / L;

[0052] The conditions of the evaporation treatment included: evaporation at a temperature of 170°C and a speed of 40 m / min;

[0053] The washing process includes washing the steamed grey cloth with a washing liquid;

[0054] The water washing temperature is 65°C; the washing solution includes soda ash, hydrosulfite, non-ionic detergent Pareda O-7 and deionized water, wherein the mass percentage of soda ash in the washing solution is 2%, the mass percentage of hydrosulfite is 0.8%, and the mass percentage of non-ionic detergent Pareda O-7 is 1%.

[0055] Example 2

[0056] This embodiment discloses a method for preparing a camouflage composite fabric, comprising the following steps:

[0057] Step 1: Mixing magnesium hydroxide, antimony trioxide, carbon nanotubes, and indium tin oxide in a mass ratio of 8:12:16:20 to obtain a composite modifier;

[0058] Step 2: mixing the composite modifier and PA66 resin chips at a mass ratio of 10:100, melting to obtain a melt, ejecting the melt through a special-shaped spinneret at a melting temperature of 280° C., the cross-section of the special-shaped spinneret is cross-shaped, cooling, drawing, drawing multiples of 4, and chopping to obtain special-shaped cross-section PA66 fibers;

[0059] The fineness of the special-shaped cross-section PA66 fiber is 1.5 dtex, and the average length of the special-shaped cross-section PA66 fiber is 38 mm;

[0060] The composite modifier and PET resin chips are mixed at a mass ratio of 10:100, melted to obtain a melt, ejected through a special-shaped spinneret at a melting temperature of 270° C., the cross-section of the special-shaped spinneret is cross-shaped, cooled, drawn, drawn at a draw ratio of 4 times, and chopped to obtain special-shaped cross-section PET fibers;

[0061] The fineness of the special-shaped cross-section PET fiber is 1.5 dtex, and the average length of the special-shaped cross-section PET fiber is 38 mm;

[0062] Step three, blend the profiled section PA66 fiber and the profiled section PET fiber, the mass ratio of the profiled section PA66 fiber and the profiled section PET fiber is 35:65, to obtain blended yarn, the yarn count of the blended yarn is 40S;

[0063] The blended yarn is used as warp yarn and weft yarn respectively to spin the fabric through weaving process to obtain a gray cloth, the warp density of the gray cloth is 200 roots / inch, and the weft density is 180 roots / inch;

[0064] Step four, the gray cloth is subjected to camouflage printing treatment, steaming treatment and washing treatment in sequence to obtain a camouflage camouflage composite fabric.

[0065] The camouflage printing treatment, the steaming treatment and the washing treatment are the same as those in Embodiment 1.

[0066] Embodiment 3

[0067] The embodiment discloses a preparation method of a camouflage camouflage composite fabric, comprising the following steps:

[0068] Step one, mix magnesium hydroxide and diantimony trioxide, carbon nanotubes and indium tin oxide, the mass ratio of the magnesium hydroxide and diantimony trioxide, the carbon nanotubes and the indium tin oxide is 4:8:10:12 to obtain a composite modifier;

[0069] Step two, mix the composite modifier and PA66 resin chips, the mass ratio of the composite modifier and the PA66 resin chips is 7:100, melt to obtain a melt, the melt is sprayed out through a profiled spinneret hole, the temperature of the melt is 280 DEG C, the shape of the cross section of the profiled spinneret hole is cross-shaped, cool, draw, the draw ratio is 4 times, cut to obtain profiled section PA66 fiber;

[0070] The fineness of the profiled section PA66 fiber is 1.5 dtex, and the average length of the profiled section PA66 fiber is 38 mm;

[0071] Mix the composite modifier and PET resin chips, the mass ratio of the composite modifier and the PET resin chips is 7:100, melt to obtain a melt, the melt is sprayed out through a profiled spinneret hole, the temperature of the melt is 270 DEG C, the shape of the cross section of the profiled spinneret hole is cross-shaped, cool, draw, the draw ratio is 4 times, cut to obtain profiled section PET fiber;

[0072] The fineness of the profiled section PET fiber is 1.5 dtex, and the average length of the profiled section PET fiber is 38 mm;

[0073] Step three, blend the profiled section PA66 fiber and the profiled section PET fiber, the mass ratio of the profiled section PA66 fiber and the profiled section PET fiber is 35:65, to obtain blended yarn, the yarn count of the blended yarn is 40S;

[0074] The blended yarn is used as warp yarn and weft yarn respectively, and the fabric is spun into a fabric through a weaving process to obtain a grey fabric, wherein the warp yarn density of the grey fabric is 200 yarns / inch and the weft yarn density is 180 yarns / inch;

[0075] Step 4: subjecting the grey fabric to camouflage printing, steaming and washing in sequence to obtain a camouflage composite fabric;

[0076] The camouflage printing treatment, steaming treatment and washing treatment are the same as those in Example 1.

[0077] Example 4

[0078] This embodiment discloses a method for preparing a camouflage composite fabric, comprising the following steps:

[0079] Step 1: Mixing magnesium hydroxide, antimony trioxide, carbon nanotubes, and indium tin oxide in a mass ratio of 5:10:12:15 to obtain a composite modifier;

[0080] Step 2: mixing the composite modifier and PA66 resin chips at a mass ratio of 8:100, melting to obtain a melt, ejecting the melt through a special-shaped spinneret at a melting temperature of 280° C., the cross-section of the special-shaped spinneret is cross-shaped, cooling, drawing, drawing multiples of 4, and chopping to obtain special-shaped cross-section PA66 fibers;

[0081] The fineness of the special-shaped cross-section PA66 fiber is 1.5 dtex, and the average length of the special-shaped cross-section PA66 fiber is 38 mm;

[0082] The composite modifier and PET resin chips are mixed at a mass ratio of 8:100, melted to obtain a melt, ejected through a special-shaped spinneret at a melting temperature of 270° C., the cross-section of the special-shaped spinneret is cross-shaped, cooled, drawn, drawn at a draw ratio of 4 times, and chopped to obtain special-shaped cross-section PET fibers;

[0083] The fineness of the special-shaped cross-section PET fiber is 1.5 dtex, and the average length of the special-shaped cross-section PET fiber is 38 mm;

[0084] Step 3: blending the special-shaped cross-section PA66 fiber and the special-shaped cross-section PET fiber, wherein the mass ratio of the special-shaped cross-section PA66 fiber to the special-shaped cross-section PET fiber is 35:65, to obtain a blended yarn, wherein the yarn count of the blended yarn is 40S;

[0085] The blended yarn is used as warp yarn and weft yarn respectively, and the fabric is spun into a fabric through a weaving process to obtain a grey fabric, wherein the warp yarn density of the grey fabric is 200 yarns / inch and the weft yarn density is 180 yarns / inch;

[0086] Step 4: subjecting the grey fabric to camouflage printing, steaming and washing in sequence to obtain a camouflage composite fabric;

[0087] The camouflage printing treatment, steaming treatment and washing treatment are the same as those in Example 1.

[0088] Example 5

[0089] This embodiment discloses a method for preparing a camouflage composite fabric, comprising the following steps:

[0090] Step 1: Mixing magnesium hydroxide, antimony trioxide, carbon nanotubes, and indium tin oxide in a mass ratio of 7:11:14:18 to obtain a composite modifier;

[0091] Step 2: mixing the composite modifier and PA66 resin chips at a mass ratio of 9:100, melting to obtain a melt, ejecting the melt through a special-shaped spinneret at a melting temperature of 280° C., the cross-section of the special-shaped spinneret is cross-shaped, cooling, drawing, drawing multiples of 4, and chopping to obtain special-shaped cross-section PA66 fibers;

[0092] The fineness of the special-shaped cross-section PA66 fiber is 1.5 dtex, and the average length of the special-shaped cross-section PA66 fiber is 38 mm;

[0093] The composite modifier and PET resin chips are mixed at a mass ratio of 9:100, melted to obtain a melt, ejected through a special-shaped spinneret at a melting temperature of 270° C., the cross-section of the special-shaped spinneret is cross-shaped, cooled, drawn, drawn at a draw ratio of 4 times, and chopped to obtain special-shaped cross-section PET fibers;

[0094] The fineness of the special-shaped cross-section PET fiber is 1.5 dtex, and the average length of the special-shaped cross-section PET fiber is 38 mm;

[0095] Step 3: blending the special-shaped cross-section PA66 fiber and the special-shaped cross-section PET fiber, wherein the mass ratio of the special-shaped cross-section PA66 fiber to the special-shaped cross-section PET fiber is 35:65, to obtain a blended yarn, wherein the yarn count of the blended yarn is 40S;

[0096] The blended yarn is used as warp yarn and weft yarn respectively, and the fabric is spun into a fabric through a weaving process to obtain a grey fabric, wherein the warp yarn density of the grey fabric is 200 yarns / inch and the weft yarn density is 180 yarns / inch;

[0097] Step four, the gray cloth is sequentially subjected to a camouflage printing treatment, a steaming treatment and a water washing treatment to obtain a camouflage camouflage composite fabric.

[0098] The camouflage printing treatment, the steaming treatment and the water washing treatment are the same as those in Embodiment 1.

[0099] Comparative Example 1

[0100] The present comparative example discloses a preparation method of a camouflage camouflage composite fabric, comprising the following steps:

[0101] Step one, magnesium hydroxide and diantimony trioxide, carbon nanotubes and indium tin oxide are mixed to obtain a composite modifier, the mass ratio of magnesium hydroxide and diantimony trioxide, carbon nanotubes and indium tin oxide being 5:5:8:10;

[0102] Step two, the composite modifier is mixed with PA66 resin chips, the mass ratio of the composite modifier and the PA66 resin chips being 6:100, melted to obtain a melt, the melt being sprayed out through a circular spinneret, the melting temperature being 280℃, cooled, drawn, the draw ratio being 4 times, and cut to obtain PA66 fibers;

[0103] The fineness of the PA66 fibers is 1.5dtex, and the average length of the PA66 fibers is 38mm;

[0104] The composite modifier is mixed with PET resin chips, the mass ratio of the composite modifier and the PET resin chips being 6:100, melted to obtain a melt, the melt being sprayed out through a circular spinneret, the melting temperature being 270℃, cooled, drawn, the draw ratio being 4 times, and cut to obtain PET fibers;

[0105] The fineness of the PET fibers is 1.5dtex, and the average length of the PET fibers is 38mm;

[0106] Step three, the PA66 fibers and the PET fibers are blended, the mass ratio of the PA66 fibers and the PET fibers being 35:65 to obtain blended yarns, and the yarn count of the blended yarns is 40S;

[0107] The blended yarns are used as warp yarns and weft yarns respectively to spin the fabric through a weaving process to obtain a gray cloth, the warp density of the gray cloth being 200 roots / inch, and the weft density being 180 roots / inch;

[0108] Step four, the gray cloth is sequentially subjected to a camouflage printing treatment, a steaming treatment and a water washing treatment to obtain a camouflage camouflage composite fabric.

[0109] The camouflage printing treatment, the steaming treatment and the water washing treatment are the same as those in Embodiment 1.

[0110] Comparative Example 2

[0111] This comparative example discloses a method for preparing a camouflage composite fabric, comprising the following steps:

[0112] Step 1: Mixing magnesium hydroxide, antimony trioxide, and indium tin oxide in a mass ratio of 5:5:10 to obtain a composite modifier;

[0113] Step 2: mixing the composite modifier with PA66 resin chips at a mass ratio of 4.3:100, melting to obtain a melt, ejecting the melt through a special-shaped spinneret at a melting temperature of 280° C., the cross-section of the special-shaped spinneret is cross-shaped, cooling, drawing, drawing multiples of 4 times, and chopping to obtain special-shaped cross-section PA66 fibers;

[0114] The fineness of the special-shaped cross-section PA66 fiber is 1.5 dtex, and the average length of the special-shaped cross-section PA66 fiber is 38 mm;

[0115] The composite modifier and PET resin chips are mixed at a mass ratio of 6:100, melted to obtain a melt, ejected through a special-shaped spinneret at a melting temperature of 270° C., the cross-section of the special-shaped spinneret is cross-shaped, cooled, drawn, drawn at a draw ratio of 4 times, and chopped to obtain special-shaped cross-section PET fibers;

[0116] The fineness of the special-shaped cross-section PET fiber is 1.5 dtex, and the average length of the special-shaped cross-section PET fiber is 38 mm;

[0117] Step 3: blending the special-shaped cross-section PA66 fiber and the special-shaped cross-section PET fiber, wherein the mass ratio of the special-shaped cross-section PA66 fiber to the special-shaped cross-section PET fiber is 35:65, to obtain a blended yarn, wherein the yarn count of the blended yarn is 40S;

[0118] The blended yarn is used as warp yarn and weft yarn respectively, and the fabric is spun into a fabric through a weaving process to obtain a grey fabric, wherein the warp yarn density of the grey fabric is 200 yarns / inch and the weft yarn density is 180 yarns / inch;

[0119] Step 4: subjecting the grey fabric to camouflage printing, steaming and washing in sequence to obtain a camouflage composite fabric;

[0120] The camouflage printing treatment, steaming treatment and washing treatment are the same as those in Example 1.

[0121] Performance testing:

[0122] The camouflage composite fabrics prepared in Examples 1-5 and Comparative Examples 1-2 were subjected to performance tests:

[0123] (1) Antistatic performance: The antistatic performance of fabrics was measured with reference to the standard GB / T12703.2-2009 "Evaluation of electrostatic properties of textiles Part 2: Charge surface density". The test results are shown in Table 1:

[0124] Table 1

[0125]

[0126] Table 1 shows that the camouflage composite fabric produced by the present invention exhibits excellent antistatic properties. The addition of carbon nanotubes, an antistatic component, creates three-dimensional conductive pathways within the fibers, reducing the amount of static charge accumulated per unit area and resulting in excellent antistatic performance. Furthermore, since both PA66 and PET fibers have a profiled cross-section, the increased surface area allows for increased moisture absorption, enhancing antistatic properties. Compared to Example 1, Comparative Example 1, where the PA66 and PET fibers lack a profiled cross-section, exhibits reduced moisture absorption and antistatic properties. Comparative Example 2, where carbon nanotubes are not added, exhibits significantly lower antistatic properties.

[0127] (2) Flame retardant properties: The flame retardant properties of the fabrics were measured with reference to the standard GB / T5454-1997 "Textile Combustion Performance Test Oxygen Index Method". The test results are shown in Table 2:

[0128] Table 2

[0129]

[0130] As shown in Table 2, the camouflage composite fabric produced by the present invention exhibits excellent flame retardancy. Due to the addition of the flame retardant components magnesium hydroxide and antimony trioxide, the two flame retardants work synergistically, resulting in a strong flame retardant effect. Furthermore, the addition of carbon nanotubes not only improves the fabric's antistatic properties, but also forms a three-dimensional network within the polymer, hindering the diffusion of combustible gases and heat transfer. During combustion, the carbon nanotubes migrate to the material surface, forming a dense carbon layer that quickly and evenly disperses heat, reducing local temperature rise and delaying thermal decomposition of the polymer, further enhancing the fabric's flame retardancy. Compared with Example 1, in Comparative Example 1, the PA66 and PET fibers do not have a special-shaped cross-section, which primarily affects the composite fabric's moisture wicking and antistatic properties, with no significant impact on the composite's flame retardancy. In Comparative Example 2, the absence of carbon nanotubes results in a decrease in the composite's flame retardancy.

[0131] (3) Moisture absorption and perspiration performance: The moisture absorption and perspiration performance of the fabric was measured with reference to the standard GB / T21655.1-2023 "Evaluation of moisture absorption and quick-drying properties of textiles Part 1: Single combination test method". The test results are shown in Table 3:

[0132] Table 3

[0133]

[0134] Table 3 shows that the camouflage composite fabric produced by the present invention exhibits excellent moisture-wicking properties. Because both the PA66 and PET fibers have a profiled cross-section, the grooves within the profiled cross-section form microchannels that, through capillary action, accelerate the directional movement of liquid water along the fiber's longitudinal direction, promoting water diffusion and evaporation. Furthermore, the large surface area of ​​the profiled cross-section allows for more surface area to be exposed to water, accelerating the evaporation rate and imparting excellent moisture-wicking properties to the composite fabric. Compared to Example 1, in Comparative Example 1, where the PA66 and PET fibers do not have profiled cross-sections, the composite fabric exhibited significantly lower moisture-wicking properties.

[0135] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a camouflage composite fabric, characterized in that: The following steps are involved: Step 1: Mixing a flame retardant, an antistatic agent, and a stealth material to obtain a composite modifier; Step 2: mixing the composite modifier with PA66 resin chips, melting them to obtain a melt, ejecting the melt through a special-shaped spinneret, cooling, drawing, and chopping to obtain special-shaped cross-section PA66 fibers; The composite modifier is mixed with PET resin chips, melted to obtain a melt, the melt is ejected through a special-shaped spinneret, cooled, drawn, and chopped to obtain special-shaped cross-section PET fibers; Step 3: blending the special-shaped cross-section PA66 fiber and the special-shaped cross-section PET fiber to obtain a blended yarn; The blended yarn is used as warp yarn and weft yarn respectively, and the fabric is spun into fabric through a weaving process to obtain a grey fabric; Step 4: subjecting the grey fabric to camouflage printing treatment, steaming treatment and water washing treatment in sequence to obtain a camouflage composite fabric.

2. The method for preparing a camouflage composite fabric according to claim 1, characterized in that: In the step 1, the mass ratio of the flame retardant, the antistatic agent, and the stealth material is (10-20):(8-16):(10-20); The flame retardant includes magnesium hydroxide and antimony trioxide; The antistatic agent includes carbon nanotubes; The stealth material includes indium tin oxide.

3. The method for preparing a camouflage composite fabric according to claim 1, characterized in that: In the step 2, when preparing the PA66 fiber with a special cross-section, the mass ratio of the composite modifier to the PA66 resin chips is (6-10):100, and the melting temperature is 270-290°C.

4. The method for preparing a camouflage composite fabric according to claim 1, characterized in that: In the step 2, when preparing the special-shaped cross-section PET fiber, the mass ratio of the composite modifier to the PET resin chips is (6-10):100, and the melting temperature is 260-280°C.

5. The method for preparing a camouflage composite fabric according to claim 1, characterized in that: In the step 3, the mass ratio of the special-shaped cross-section PA66 fiber to the special-shaped cross-section PET fiber is (25-45):(55-75), and the yarn count of the blended yarn is 30-50S.

6. The method for preparing a camouflage composite fabric according to claim 1, characterized in that: In the step 3, the warp yarn density of the grey cloth is 180-220 yarns / inch, and the weft yarn density is 160-200 yarns / inch.

7. The method for preparing a camouflage composite fabric according to claim 1, characterized in that: In the step 4, the camouflage printing material used in the camouflage printing process includes disperse dyes, acid dyes, reactive dyes, sodium alginate, urea and deionized water; In the camouflage printing material, the concentration of disperse dye is 25-35 g / L, the concentration of acid dye is 50-70 g / L, the concentration of reactive dye is 50-60 g / L, the concentration of sodium alginate is 100-200 g / L, and the concentration of urea is 8-12 g / L.

8. The method for preparing a camouflage composite fabric according to claim 7, characterized in that: In the step 4, the conditions for the steaming treatment include: steaming at a temperature of 165-175° C. and a speed of 35-45 m / min.

9. The method for preparing a camouflage composite fabric according to claim 1, characterized in that: In the step 4, the washing treatment includes washing the evaporated grey cloth with a washing liquid; Among them, the water washing temperature is 60-70℃; The washing solution is prepared by comprising soda ash, hydrosulfite, non-ionic detergent and deionized water; The mass percentage of soda ash in the washing liquid is 1.5%-2.5%, the mass percentage of hydrosulfite is 0.6%-1%, and the mass percentage of non-ionic detergent is 0.8%-1.2%.

10. A camouflage composite fabric prepared by the method for preparing a camouflage composite fabric according to any one of claims 1 to 9.

Images