Method for manufacturing fabric for flame-retardant camouflage pattern combat uniform having excellent elasticity, infrared shielding function, and heat resistanec

Abstract

The present invention relates to a fabric for a camouflage pattern combat uniform for military use. The present invention can provide a fabric for a camouflage pattern combat uniform, having excellent elasticity, permanent flame retardancy, a printed camouflage pattern, and an infrared shielding function.

Description

Method for manufacturing flame-retardant camouflage combat uniform fabric with excellent elasticity, infrared blocking function, and heat resistance

[0001] The present invention relates to a fabric for military camouflage combat uniforms, and to a method for manufacturing a combat uniform fabric that provides flame retardancy and has infrared blocking functionality and elasticity for improved activity by applying a high heat-resistant flame retardant fiber material.

[0002] Excluding the flame retardant treatment, the fiber materials that have flame retardancy in themselves are not as diverse as PPS, PBI, and PBO, such as meta-Aramid, para-Aramid, Modacryl, FR-Rayon, FR-PET, and Oxi-Pan fibers. Fiber materials that can be used for military camouflage printing and dyeing are limited to FR-Rayon and FR-PET. FR-PET melts and reddens when carbonized, so it cannot be used for clothing. FR-Rayon is easy to print and dye, but its low strength makes it unsuitable for military clothing. Modacryl can be printed and dyed when used alone, but it is unsuitable for military clothing. Aramid, Oxi-Pan, PPS, and PBI fibers each have the disadvantage of not being able to print and dye.

[0003] Therefore, the current South Korean military flame-retardant uniforms are made of composite fibers of FR-Rayon and Aramid fibers for the Army's tracked vehicle crew combat uniforms and the Navy's shipboard flame-retardant uniforms, and only the FR-Rayon is partially dyed, so the color expression is limited, resulting in poor daytime camouflage performance, and there is a problem that it cannot be used for nighttime camouflage because it cannot be provided with an infrared blocking function. However, for safety in the event of a flame explosion, it is limited to partially using combat welfare fabrics that only have flame-retardant functionality.

[0004] In addition, there is a need to develop a fabric for military uniforms that improves the lack of elasticity, which reduces mobility and makes movement difficult in confined work spaces such as on board rail vehicles and ships.

[0005] Therefore, the present invention provides a technical task of manufacturing a blended yarn using cellulose fibers, polyamide-imide fibers, aramid fibers, and spandex fibers, and weaving the yarn into a fabric to provide a combat uniform fabric that provides elasticity while also providing day and night camouflage function and high heat resistance and flame retardancy.

[0006] Therefore, in the present invention, there is provided a step of making a mixed spun yarn using cellulose fibers, polyamide-imide fibers, and aramid fibers;

[0007] A step of making a spandex yarn covering mixed spun yarn by stretching and covering the above mixed spun yarn;

[0008] A step of manufacturing a fabric using the above mixed spun yarn and spandex yarn covering mixed spun yarn; and

[0009] A method for manufacturing a flame-retardant camouflage combat uniform fabric with excellent elasticity, infrared blocking function and heat resistance is provided, characterized by performing a pretreatment step, a dyeing step and a heat-setting step on the above fabric.

[0010] Hereinafter, the present invention will be described in more detail.

[0011] The present invention manufactures a warp-type blended spun yarn using a flame-retardant fiber material, manufactures a weft-type composite spun yarn with a spandex covering to impart elasticity, manufactures a fabric suitable for military clothing using the manufactured warp and weft-type composite spun yarns, and manufactures a fabric for manufacturing military clothing by subjecting the manufactured fabric to camouflage pattern printing and heat-setting steps.

[0012] First, in the mixed spun yarn manufacturing step, flame-retardant fiber materials are used by mixing cellulose fibers, polyamide-imide fibers, and aramid fibers. Flame-retardant cellulose fibers may be included among the cellulose fibers, and these are FR materials containing phosphorus-based inorganic substances. Fibers manufactured by manufacturers such as Lenzing FR and Daiwabo FR-Celluse can be used. Increasing the weight ratio of flame-retardant cellulose fibers improves vivid color expression and dyeing effect, but reduces strength, making them unsuitable for military clothing. In addition, if the weight ratio is too low, color expression is limited, resulting in a lack of daytime camouflage function.

[0013] Polyamide-imide fibers are stronger than meta-aramid fibers, and have a flame retardant LOI of 30-32% compared to 28% for aramid, which provides excellent heat resistance and low thermal conductivity, which enhances the strength of military clothing. They also have a natural color, making them effective for implementing daytime camouflage colors.

[0014] The above mixed spun yarn is made primarily of cellulose fibers having a fiber length of 36 to 55 mm and a fineness of 0.9 to 2.5 denier, polyamide-imide fibers having a fiber length of 36 to 55 mm and a fineness of 0.9 to 2.5 denier, and aramid fibers having a fiber length of 36 to 55 mm and a fineness of 0.9 to 2.5 denier. The cellulose fibers are blended in an amount of 50 to 80 wt%, the polyamide-imide fibers in an amount of 15 to 40 wt%, and the aramid fibers in an amount of 5 to 10 wt% to produce the mixed spun yarn. The cellulose fibers may be entirely flame-retardant cellulose, and in some cases, to improve the strength of the fabric, 40 to 70 wt% of flame-retardant cellulose fibers and 5 to 20 wt% of Lyocell fibers are contained in the entire mixed spun yarn, which helps in achieving swelling properties, strength, and vivid colors of the fabric.

[0015] It is preferable to contain 15 to 40% by weight of polyamide-imide fiber and 5 to 10% by weight of aramid fiber. When the polyamide-imide fiber exceeds 40% by weight and the aramid fiber exceeds 10% by weight, the strength of the fabric improves, but the color expression and infrared shielding function are poor. When the polyamide-imide fiber is less than 15% by weight and the aramid fiber is less than 5% by weight, the color expression is advantageous, but the strength of the fabric is poor.

[0016] The above mixed spun yarn can be manufactured by any one of ring spinning, air jet spinning, and roto spinning, and the single yarn preferably has a fineness of Nec 10 to 40. When used as a double-twisted yarn to improve the strength of the fabric, it is preferable to have a fineness of Nec 20 / 2 to 80 / 2.

[0017] Spandex-covered blended spun yarn is manufactured by covering blended spun yarn with spandex yarn to impart elasticity. Two strands of the blended spun yarn are used as cores, and a single strand of spandex is drawn 1.5 to 3.5 times and wound to form a plywood yarn. This is then subjected to a three-ply covering process in a twisting machine to manufacture a spandex-covered blended spun yarn. When the spandex yarn draw ratio is less than 1.5 times, the elasticity is low, and when it is 3.5 times or more, the elasticity is good, but there is a disadvantage in that there is a lot of yarn breakage during fabric manufacturing. In this case, it is preferable that the polyurethane fiber content be 1 to 5 wt% in the entire spandex-covered blended spun yarn.

[0018] Thereafter, a step of manufacturing a fabric is performed using the above-mentioned mixed spun yarn as a warp yarn and the above-mentioned spandex-covered mixed spun yarn as a weft yarn. The fabric can be manufactured into a plain weave, a rib stop weave, a twill weave, a rib stop weave, etc. Plain weave and rib stop weave can have high strength even if the fabric basis weight is low, so they are easy to graft into summer fabrics, and twill weave provides a clear appearance and a soft touch, so it is mainly preferable for winter use due to its high fabric basis weight. The fabric basis weight is preferably 150 to 280 g / ㎡. If it is less than 150 g / ㎡, the fabric's breaking strength is greatly reduced, and if it exceeds 280 g / ㎡, the dye penetration may be uneven during printing. In some cases, the mixed spun yarn and the above-mentioned spandex-covered mixed spun yarn can be supplied alternately in a 1:1 ratio as a weft yarn and the above-mentioned spandex-covered mixed spun yarn, which is preferable because it can satisfy both elasticity and the dimensional stability of the fabric.

[0019] Afterwards, the fabric undergoes a pretreatment step, a dyeing step, and a heat-setting step. The pretreatment step consists of a scouring and bleaching step.

[0020] When using mixed spun yarn as a single yarn, sizing is required in the weaving preparation process to compensate for yarn breakage, so desizing is essential to reduce unevenness during printing and dyeing. The desizing agent is P-ABC 2g / L, BIO-400 25g / L, 80℃, 50m / min, 6hr, and the scouring and bleaching is H2O2 20g / L, 30℃, 50m / min 10hr. When using mixed spun yarn as a double-twisted yarn, sizing is not required in the weaving preparation process, so desizing is not necessary in the dyeing pretreatment stage.

[0021] After the desizing process is completed, it goes through a refining bleaching process, and a weak alkali treatment is required to achieve a vivid color. The alkali treatment is performed with 1.2 cc / L of NaOH (50°Be') and 1 g / L of metal stabilizer, H2O2. Using 5g / L minimizes fabric damage and removes sufficient impurities. Polyamide-imide fibers, as dope-dyed fibers, have the advantage of not requiring ground dyeing before printing.

[0022] The dyeing process involves tentacle extrusion, dyeing, and fixation. To ensure uniform elasticity, spandex fibers are typically treated at high dry temperatures, typically 180°C to 190°C or higher. Below 180°C, the spandex fibers are unstable, rendering the fabric unstable and resulting in uneven dyeing. High temperatures exceeding 190°C can cause yellowing of the cellulose fibers, making color reproduction difficult, so caution is advised.

[0023] After the tentacles are exposed, dyeing is performed, preferably using the rotary method. Although the cellulose material itself can achieve sufficient fastness with general reactive dyes, dyeing using VAT dyes is required to achieve color expression and high fastness.

[0024] Since military uniform fabrics require infrared shielding, they are dyed with VAT dyes that combine Cibanone-based VAT dyes and Indanthrene-based VAT dyes with specific reflectance in the NIR range (600 nm-1260 nm), and express infrared reflectance wavelengths of the five colors of the ROK Armed Forces (charcoal, chocolate, dark green, green, beige gray).

[0025] Fixation is carried out in a high-temperature steamer for fixation between dye and fiber, and a coloring agent containing NaOH (50°Be) and Hydrosulfite, respectively, 100 to 120 g / L, sodium tetraborate (Borax), 8 to 15 g / L, and sodium sulfate 50 to 100 g / L is used, and the treatment is performed in a high-temperature steamer at a temperature of 120 to 130°C for 20 to 30 seconds. In the case of a fabric containing the spandex material of the present invention, 8 to 15 g / L of sodium tetraborate (Borax) and 50 to 100 g / L of sodium sulfate are added for stabilization. However, when sodium tetraborate (Borax) is less than 8 g / L, the dye coagulates slowly on the fabric, causing a problem of unevenness, and when it exceeds 15 g / L, a problem of lowering the texture of the fabric occurs. When sodium sulfate is less than 50 g / L, it is not fixed. The VAT dye spreads within the padding, causing color change problems, and when it exceeds 100 g / L, the fabric properties deteriorate.

[0026] In the heat setting stage, only 10 to 20 g / L of general hydrophilic softener and 2 to 5 g / L of citric acid (C6H8O7) as a catalyst are treated in Tenta, and silicone softeners are not used because they lower the flame retardancy. Additionally, 10 to 20 g / L of a nitrogen-based phosphoric acid flame retardant is treated to prevent the decrease in flame retardancy due to the softener. When the nitrogen-based phosphoric acid flame retardant is treated in excess of 20 g / L, the flame retardancy temporarily increases, but it is easily removed during washing and makes the texture of the fabric hard. Since the fabric fiber material of the present invention is composed of cellulose, aramid-based flame retardant material, and spandex material, it must be dried at a dry heat temperature of 190 to 200°C to ensure the dimensional stability of the fabric and reduce deformation during washing. When the temperature is lower than 190°C, the spandex of the final fabric is not fixed, resulting in a significantly reduced shrinkage rate during washing. When treated at a dry heat temperature exceeding 200℃, the color may change due to yellowing of the cellulose and the infrared shielding function may be reduced, so caution is required.

[0027] In this way, the manufacturing of a flame-retardant camouflage pattern combat uniform fabric with excellent elasticity and infrared blocking function is completed in stages.

[0028] Therefore, according to the present invention, a camouflage pattern combat uniform fabric having excellent elasticity, permanent flame retardancy, dyeable camouflage pattern, and infrared shielding functionality can be provided.

[0029] Figure 1 is a photograph of the flame-retardant camouflage pattern combat uniform fabric of the present invention.

[0030] The following examples provide non-limiting examples of a method for manufacturing a flame-retardant camouflage combat uniform fabric having excellent elasticity, infrared blocking function, and heat resistance according to the present invention.

[0031] [Example 1]

[0032] It is composed of 60 wt% FR-Celluse, 10 wt% lyocell fiber, 25 wt% polyamide-imide fiber, and 5 wt% para-aramid fiber. FR-Celluse is used with a fiber length of 51 mm with a 1.5 denier, lyocell fiber is used with a fiber length of 51 mm with a 1.25 denier, polyamide-imide fiber ("Polyamid-imide" from Kermel) is used with a fiber length of 51 mm with a 1.5 denier, and para-aramid is used with a 1.5 denier 51 mm. Using the ring spinning method, a mixed spun yarn Nec 36 / 2 count with a twist count of 800 was manufactured and prepared for warp use. In addition, in order to provide elasticity, spandex was stretched 3.0 times and covered on the mixed spun yarn to manufacture a spandex-covered mixed spun yarn, and prepared for weft use. A plain weave fabric was woven using the above yarn, and in order to improve elasticity, spandex yarn covering mixed spun yarn and mixed spun yarn were alternately supplied in a 1:1 ratio when supplying the weft yarn.

[0033] The fabric woven in this way is slightly alkaline treated with 1.2 cc / L of NaOH (50°Be'), scoured and bleached using 1 g / L of metal stabilizer and 5 g / L of H₂O, then tentered at a dry temperature of 180°C, and then printed at 130°C and 20 m / min with a VAT dye that combines a Cibanone-based VAT dye and an Indanthrene-based VAT dye with specific reflectance in the NIR region (600 nm-1260 nm), then a coloring agent containing 100 g / L each of NaOH (50°Be) and Hydrosulfite, 10 g / L of Borax, and 80 g / L of Sodium Sulfate is used, and fixation between the dye and the fiber is performed in a high-temperature steamer at 130°C for 20 to 30 seconds, and then tentered with 15 g / L of Hydrophilic softener and citric acid. After immersing in a treatment solution containing 2 g / L of nitrogen-based phosphoric acid flame retardant and 10 g / L of water as the balance, the fabric was dried at a dry heat temperature of 190°C to complete the manufacture of a flame-retardant camouflage combat uniform fabric having a fabric weight of 200 g / ㎡.

[0034] [Comparative Example 1]

[0035] Using the same Ring Spinning as Example 1, it is composed of 88 wt% FR-Celluse and 12 wt% polyvinyl alcohol fiber, and the FR-Celluse uses the same fiber material as Example 1, and the polyvinyl alcohol fiber uses 1.5 denier fiber length 51 mm to manufacture TPM 800, Nec 36 / 2 ply yarn, and then uses it as warp and weft yarn to weave a plain weave fabric of the same basis weight as Example 1, and then the dyeing pretreatment step is processed in the same way as Example 1, and then a tenter bursting temperature of 130°C is applied, and after printing with a reactive dye, the same preparation treatment as Example 1 in the tenter is performed, and then a camouflage pattern combat uniform fabric is manufactured by drying at 130°C.

[0036] The physical properties of the fabrics of Example 1 and Comparative Example 1 were measured and shown in Table 1, and the infrared reflectance (%) of the fabric of Example 1 was measured and shown in Table 2.

[0037] Classification Tensile strength (N) Tear strength (N) Fireproofing degree (%) IR reflectance Aftershock time (S) Carbonization distance (cm) Example 1440420212.7 IR shielding expression Comparative example 240128012-IR shielding expression

[0038] Wavelength by color (nm) Charcoal color Chocolate color Dark Olive Green Forest Green Beige gray 600 3 ~ 184 184 186 1818 326 203 ~ 184 184 186 1818 326 403 ~ 184 184 186 2018 326 603 ~ 226 184 188 2220 406 804 ~ 2812 244 2212 3028 487 00 12 ~ 2812 248 2214 3238 587 2018 3616 3610 2822 4638 587 4018 3616 3610 2822 4638 587 4018 361 3616 ~ 3616 ~ 2828 ~ 5246 ~ 7276024 ~ 4024 ~ 4418 ~ 3428 ~ 5646 ~ 7278024 ~ 4024 ~ 4422 ~ 4034 ~ 6446 ~ 7280028 ~ 4630 ~ 5222 ~ 4634 ~ 6452 ~ 7682028 ~ 4630 ~ 5224 ~ 5234 ~ 6452 ~ 7684032 ~ 4834 ~ 5824 ~ 5440 ~ 7052 ~ 7686032 ~ 4834 ~ 5824 ~ 5840 ~ 7052 ~ 7688036 ~ 5638 ~ 6434 ~ 6440 ~ 7052 ~ 7690036 ~ 5638 ~ 6434 ~ 6446 ~ 7252 ~ 7692040 ~ 6644 ~ 6638 ~ 7246 ~ 7252 ~ 7694040 ~ 6644 ~ 6640 ~ 7448 ~ 7352 ~ 7696040 ~ 6644 ~ 6640 ~ 7448 ~ 7352 ~ 7698044 ~ 6844 ~ 6846 ~ 7648 ~ 7352 ~ 76100044 ~ 6844 ~ 6846 ~ 7648 ~ 7352 ~ 76102046 ~ 6944 ~ 6848 ~ 7848 ~ 7352 ~ 76104046 ~ 6944 ~ 6848 ~ 7848 ~ 7352 ~ 76106046 ~ 6944 ~ 6848 ~ 7848 ~ 7352 ~ 76108046 ~ 6944 ~ 6848 ~ 7849 ~ 7452 ~ 76110046 ~6944 ~ 6848 ~ 7849 ~ 7452 ~ 76112046 ~ 6944 ~ 6848 ~ 7849 ~ 7452 ~ 76114046 ~ 6944 ~ 6848 ~ 7849 ~ 7452 ~ 76116046 ~ 6944 ~ 6848 ~ 7850 ~ 7552 ~ 76118046 ~ 6945 ~ 6850 ~ 8050 ~ 7553 ~ 76120047 ~ 6945 ~ 6848 ~ 7850 ~ 7653 ~ 76122047 ~ 7045 ~ 6848 ~ 7850 ~ 7653 ~ 76124047 ~ 7045 ~ 6849 ~ 7950 ~ 7653 ~ 76126047 ~ 7045 ~ 6849 ~ 7950 ~ 7653 ~ 76

[0039] According to the present invention, a combat uniform fabric having flame retardancy and infrared blocking functionality and elasticity for improved activity can be provided by applying a high heat-resistant flame retardant fiber material.

Claims

1. A step of making a blended spun yarn using cellulose fibers, polyamide-imide fibers, and aramid fibers; A step of making a spandex yarn-covered mixed spun yarn by stretching and covering the above mixed spun yarn with spandex yarn; A step of manufacturing a fabric using the above mixed spun yarn and spandex yarn covering mixed spun yarn; and A method for manufacturing a flame-retardant camouflage combat uniform fabric having excellent elasticity, infrared blocking function and heat resistance, characterized by performing a pretreatment step, a dyeing step and a heat fixation step on the above fabric.

2. In paragraph 1, The above mixed spun yarn has cellulose fibers having a fiber length of 36 to 55 mm and a fineness of 0.9 to 2.5 denier, polyamide-imide fibers having a fiber length of 36 to 55 mm and a fineness of 0.9 to 2.5 denier, and aramid fibers having a fiber length of 36 to 55 mm and a fineness of 0.9 to 2.5 denier, and is characterized by a mixture of 50 to 80 wt% of cellulose fibers, 15 to 40 wt% of polyamide-imide fibers, and 5 to 10 wt% of aramid fibers. A method for manufacturing a flame-retardant camouflage combat uniform fabric having excellent elasticity, infrared blocking function, and heat resistance.

3. In paragraph 1, A method for manufacturing a flame-retardant camouflage combat uniform fabric with excellent elasticity, infrared blocking function, and heat resistance, wherein the above mixed spun yarn is manufactured by any one of ring spinning, air jet spinning, and roto spinning, and has a single yarn count of Nec 10 to 40, and a double-twisted yarn count of Nec 20 / 2 to 80 / 2.

4. In paragraph 1, A method for manufacturing a flame-retardant camouflage combat uniform fabric having excellent elasticity, infrared blocking function and heat resistance, wherein the fabric is characterized by being any one of plain weave, rib stop plain weave, twill weave and twill rib weave.

5. In paragraph 1, A method for manufacturing a flame-retardant camouflage pattern combat uniform fabric having excellent elasticity, infrared blocking function, and heat resistance, characterized in that the fabric has a basis weight of 150 to 280 g / m².

6. In paragraph 1, The above pretreatment step consists of refining and bleaching, The above dyeing process is performed by using a VAT dye that combines a Cibanone-based VAT dye and an Indanthrene-based VAT dye that have specific reflectance in the NIR region (600 to 1260 nm) after tenter explosion at a dry temperature of 180 to 190°C, and then using a coloring agent containing 100 to 120 g / L of NaOH (50°Be) and Hydrosulfite, 8 to 15 g / L of sodium tetraborate (Borax), and 50 to 100 g / L of sodium sulfate, fixing treatment is performed in a high-temperature steamer at a temperature of 120 to 130°C for 20 to 30 seconds. A method for manufacturing a flame-retardant camouflage combat uniform fabric with excellent elasticity, infrared blocking function and heat resistance, characterized in that in the above heat-fixing step, the fabric is immersed in a treatment solution containing 10 to 20 g / L of a hydrophilic softener, 2 to 5 g / L of citric acid, 10 to 20 g / L of a nitrogen-based phosphoric acid flame retardant and the remainder water, and then dried at a dry temperature of 190 to 200°C.

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